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STUDIES OF AMERICAN PLANTS— IX

BY

PAUL C. STANDLEY

CURATOR OF THE HERBARIUM, DEPARTMENT OP BOTANY

THE LIBRARY OF THE

FEB101940

UNIVERSITY OF ILLINOIS

BOTANICAL SERIES

FIELD MUSEUM OF NATURAL HISTORY

VOLUME 22, NUMBER 1

JANUARY 26, 1940

PUBLICATION 463

PRINTED IN THE UNITED STATES OP AMERICA

BY FIELD MUSEUM PRESS

STUDIES OF AMERICAN PLANT&-IX

PAUL C. STANDLEY

During the past few years the writer has had occasion to deter-

__j mine many collections of tropical American plants, in some of

* which were found the apparently new plants described upon the

3 following pages. The majority of the new species here described

E are from the rich collections made in the Chiriqui region of Panama

3 by Mrs. M. E. Davidson; from the large series obtained in Sonora

o and Chihuahua by Mr. Howard Scott Gentry; from the Mexican

^f

! plants obtained by collectors from the University of Texas, par-

*v ticularly Mr. Harde LeSueur; and from various series forwarded by

* Dr. C. L. Lundell of the University Museums of the University of

* Michigan. Most of these collections contain numerous additional

~" new species whose descriptions have not yet been prepared.

The writer is under special obligations to Dr. William Trelease,

who supplied descriptions of the new Piperaceae, and to Dr. Robert

E. Woodson, Jr., who furnished the diagnosis of a new species of

Zschokkea discovered the past season in Guatemala.

ARAGEAE

o Anthurium clidemioides Standl., sp. nov. — Epiphytica scan-

*• dens, caudiculo elongate flexuoso gracili vix ultra 2 mm. crasso

viridi albo-verrucoso, internodiis elongatis; petiolus ca. 3 cm. longus

viridis longe anguste vaginatus; lamina deltoideo-ovata usque 12.5

cm. longa atque prope basin 7.5 cm. lata longe angusteque attenuato-

r< acuminata, basi breviter cordata, sinu aperto lato, lobis posticis

late rotundatis, supra laete viridis ubique arete bullata, nervis

venulisque profunde impressis, subtus pallidior ubique profunde

lacunosa, e basi 5-nervia, nervis 2 interioribus fere ad apicem pro-

!, tractis; inflorescentia sessilis, spatha pallide viridi lanceolata ca. 4

f cm. longa longe anguste attenuata tenui suberecta; spadix 4.5 cm.

longus supra basin 5 mm. latus, e basi ad apicem paullo angustatus.

—Costa Rica: Villa Quesada, San Carlos, alt. 800 meters, March 6,

1938, Manuel Valeria 1726 (type in Herb. Field Mus.).

This is one of the most distinct and most remarkable of all the

\j_ many species of Anthurium known from Central America, and I

have seen no similar plant from any other region. The strongly

4 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. 22

and closely bullate leaves, with melastomoid venation, strongly

suggest those of certain Melastomaceae, particularly of the genus

Clidemia.

Anthurium Davidsoniae Standl., sp. nov. — Ut dicitur ter-

restris, caudiculo elongate 6 mm. crasso, internodiis brevibus;

cataphylla lineari-attenuata usque 12 cm. longa in sicco fusco-

ferruginea; petioli gracillimi 12-19 mm. longi; lamina ovato-ovalis

vel late ovalis 15-18 cm. longa 9.5-11 cm. lata, apice obtusa et

subito caudato-acuminata, acumine angusto 2 cm. longo et ultra,

basi late breviterque cordata, lobis posticis late rotundatis, mem-

branacea, supra pallido-viridis, subtus paullo pallidior, e basi 9-

nervia, costa prominente gracillima, nervis lateralibus utroque latere

ca. 12 angulo semirecto adscendentibus tenerrimis subarcuatis prope

marginem in nervum collectivum conjunctis, venulis prominulis

laxe reticulatis; pedunculi graciles 9-11 cm. longi; spatha reflexa

anguste oblonga in sicco fusco-brunnea ca. 3 cm. longa atque 5 mm.

lata longiacuminata; spadix sessilis obtusus 2.5-3.5 cm. longus 3-4

mm. crassus. — Panama: In rain forest, Bajo Chorro, Boquete Dis-

trict, Provincia de Chiriqui, alt. 1,800 meters, January 17, 1938,

Mrs. M.E. Davidson 134 (type in Herb. Field Mus.).

Anthurium seamayense Standl., sp. nov. — Epiphytica, caudi-

culo ut videtur brevi ca. 7 mm. crasso, internodiis brevibus; cata-

phylla ca. 5 cm. longa brunnea lanceolata rigida acuminata striata;

petiolus gracillimus basi vix dilatatus 22-26 cm. longus, geniculo

12 mm. longo; lamina oblongo-ovata ca. 22 cm. longa atque 10 cm.

lata subito breviter cuspidato-acuminata, basi profunde cordata,

lobis posticis 6.5 cm. longis 4.8 cm. latis late rotundatis, sinu angusto

vel clause, utrinque lucida, e basi 5-nervia, nervis infimis trifurcis,

costa subtus elevata gracili utroque latere supra basin nervos ca. 8

prope marginem in nervum collectivum conjunctos emittente, venulis

prominulis laxe reticulatis; pedunculus petiolis subaequalis ca. 22

cm. longus gracillimus; spatha reflexa lanceolato-oblonga in sicco

brunnea 4.5 cm. longa 1 cm. lata longiuscule acuminata; spadix

sessilis obtusus 4 cm. longus 4 mm. crassus. — Guatemala: In virgin

forest, Seraxcaj, Finca Seamay, Alta Verapaz, alt. 960 meters,

February 15, 1939, C. L. Wilson 211 (type in Herb. Field Mus.).

COMMELINACEAE

Tradescantia anisophylla Standl., sp. nov. — Herba ramosa ut

videtur procumbens, caulibus gracillimis glabris, internodiis pie-

STUDIES OF AMERICAN PLANTS — IX 5

rumque foliis longioribus; vaginae angustae 12-15 mm. longae ore

valde obliquae brunnescentes, margine dorsoque dense pilis albidis

longis patentibus hirsutae; folia inaequalia, superiora latiora, ovato-

oblonga vel ovata, bracteis interdum subdeltoideo-ovatis, 4-5 cm.

longa 2-2.5 cm. lata acuminata vel longiacuminata, basi subito

contracta et truncata vel late rotundata, glabra; inflorescentia

terminalis breviter vel longissime pedunculata dense multiflora,

bracteis foliis conformibus sed paullo latioribus paulo inaequalibus,

pedicellis filiformibus usque 15 mm. longis pilis longis albidis laxis

patentibus pilosis; sepala lanceolato-linearia ca. 6 mm. longa pellu-

cida viridi-costata apice breviter piloso-penicillata; petala caerulea

8 mm. longa et ultra eleganter venosa; stamina inaequilonga, fila-

mentis longipilosis. — Mexico: Mount Tacana, Chiapas, alt. 1,000-

2,000 meters, August, 1938, E. Matuda 2505 (type in Herb. Field

Mus.).

In general appearance this is much like T. tacanana of the same

region, but there are obvious differences in the form of the leaves

and sheaths.

Tradescantia belizensis Standl., sp. nov. — Herba ramosa,

caulibus ut videtur procumbentibus ad nodos radicantibus pilis

longissimis mollibus albidis patentibus vel subadpressis pilosis,

internodiis foliis longioribus vel brevioribus; vaginae sublaxae 9-12

mm. longae plus minusve dense pilis longis albidis pilosae; folia

lanceolato-oblonga 4-8 cm. longa 1.3-2.8 cm. lata longiacuminata,

basi obliqua et breviter abrupte contracta, utrinque pilis longis-

simis laxis pallidis sat dense pilosa; inflorescentia terminalis longi-

pedunculata vel interdum breviter tantum pedunculata, bracteis

foliis conformibus atque fere aequilongis basi valde dilatatis pa-

tentibus, floribus longe vel breviter graciliter pedicellatis; petala

pallido-rosea ca. 8 mm. longa glabra; stamina inaequalia, 3 breviora,

filamentis longipilosis. — British Honduras: On hilltop, Vaca, El Cayo

District, February 23, 1938, Percy H. Gentle 2228 (type in Herb.

Univ. Michigan; fragment in Herb. Field Mus.).

Tradescantia Lundellii Standl., sp. nov. — Herba ramosa pro-

cumbens(?), caulibus gracillimis glabris vel in sulcis breviter pilosis,

internodiis elongatis sed foliis brevioribus; vaginae angustae ca. 1

cm. longae ore oblique truncatae et dense pilis longissimis laxis

pallidis pilosae, dorso quoque breviter pilosae; folia anguste oblongo-

lanceolata vel lineari-lanceolata 2.5-5.5 cm. longa 3-12 mm. lata

longe anguste attenuata basi obliqua obtusa vel subrotundata gla-

6 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. 22

bra; flores umbellati, umbellis axillaribus et terminalibus solitariis

vel geminatis pedunculos gracillimos interdum recurves usque 3 cm.

longos terminantibus, basi bracteis 2 pallidis lanceolato-linearibus

usque 5 mm. longis fulcratis, plerumque 2-4-floris, pedicellis fili-

formibus usque 1 cm. longis glabris; sepala tenuia ovalia vel oblonga

pallide viridia 2-2.5 mm. longa glabra obtusa; petala alba late

elliptica vel ovalia apice rotundata glabra; stamina inaequalia, fila-

mentis longipilosis. — Mexico: Tamazunchale, San Luis Potosi, in

second growth on wet hillside, alt. 300 meters, July, 1937, C. L. &

Amelia A. Lundell 7098 (type in Herb. Field Mus.; duplicate in

Herb. Univ. Michigan). Chapulhuacan, Hidalgo, in wet Liquidam-

bar forest, alt. 1,300 meters, July, 1937, C. L. & Amelia A. Lundell

7160.

Noteworthy for the combination of slender habit, short, narrow

leaves, and small, white flowers arranged in small, open, lax umbels.

Tradescantia plusiantha Standl., sp. nov. — Herba erecta(?)

vel decumbens 40 cm. longa et ultra ramosa, caulibus gracilibus

dense minute pilis patentibus villosulo-pilosulis, internodiis valde

elongatis folia fere aequantibus; vaginae laxae ca. 1 cm. longae

oblique truncatae ubique dense minute pilosulae, margine breviter

hirsutae; folia majuscula oblongo-elliptica vel ovato-oblonga 13 cm.

longa et ultra 3.5-4.5 cm. lata anguste acuminata, basi cuneato-

acuta atque in petiolum crassiusculum usque 1.5 cm. longum con-

tracta, supra sparse minute pilosula vel glabrata, subtus sparse

puberula vel fere glabra; inflorescentia terminalis, floribus umbellu-

latis, umbellulis in umbellam laxam multiradiatam dispositis, um-

bellae radiis gracillimis suberectis inaequalibus ad 5 cm. longis

dense breviter villosulo-pilosulis; bracteae umbellulam fulcrantes

rotundato-ovatae virides 10-14 mm. longae obtusae vel acutae basi

breviter coalitae complanatae minute puberulae; flores in umbellula

numerosae, pedicellis gracillimis ad 4 mm. longis glabris; sepala

tenuia ovata subacuta ca. 3 mm. longa viridescentia sparse breviter

pilosula vel glabrata; petala ut videtur alba. — Mexico: Mount

Ovando, Chiapas, alt. 1,250-2,370 meters, July, 1938, E. Matuda

2569 (type in Herb. Univ. Michigan; fragment in Herb. Field Mus.).

No other species that I have seen is closely similar to this, which

is outstanding because of the large, broad, thin leaves, and the very

numerous and umbellate spathes.

Tradescantia tacanana Standl., sp. nov. — Herba ramosa ut

videtur decumbens vel procumbens, caulibus gracilibus elongatis

STUDIES OF AMERICAN PLANTS — IX 7

glabris, internodiis elongatis, interdum foliis longioribus; vaginae

angustae ca. 12 mm. longae margine dorsoque pilis longis albidis

rigidiusculis sat dense hirsutae striato-nervosae ore subtruncatae;

folia lanceolato-oblonga 7-9 cm. longa ca. 2.5 cm. lata longe attenu-

ato-acuminata, basi subobliqua obtusa subito contracta, glabra;

inflorescentia terminalis umbelliformis sat longe pedunculata, brac-

teis 2 foliis conformibus usque 5.5 cm. longis; flores pauci longi-

pedicellati, pedicellis filiformibus ad 14 mm. longis sparse pilis longis

laxis patentibus pilosis; sepala lineari-oblonga attenuata 6 mm.

longa apice piloso-penicillata; petala ut videtur caerulea. — Mexico:

Mount Tacana, Chiapas, alt. 1,000-2,000 meters, August, 1938,

E. Matuda 2504 (type in Herb. Univ. Michigan).

SMILACACEAE

S mi lax calocardia Standl., sp. nov. — Frutex scandens, cauli-

bus superioribus gracillimis teretibus brunneis striatis inermibus

fere omnino glabris, in statu juveni sparse pilosis, internodiis elon-

gatis; folia mediocria longiuscule petiolata coriacea, petiolo 1.5-3

cm. longo sparse hinc inde piloso, prope basin densius piloso longi-

vaginato crasso; lamina late ovata vel orbiculari-cordata 6-10 cm.

longa 3.5-8.5 cm. lata longiacuminata vel apice rotundata atque

apiculato-acuminata, basi profunde cordata, integra, lobis posticis

late rotundatis, sinu aperto vel clause, supra lucida glabra, nervis

venisque prominentibus atque arete pulchre reticulatis, subtus con-

color glabra vel glabrata, in statu juvenili ut videtur sparse pilosa,

e basi 9-nervia, plus minusve lucida, venulis prominentibus atque

eleganter arcteque reticulatis; umbellae masculae solitariae axil-

lares, pedunculo rigido ca. 1 cm. longo densiuscule breviter villoso

petiolo multo breviore; receptaculum globosum ca. 3.5 mm. diam.

dense pilosum, bracteolis numerosis dense aggregatis; pedicelli gra-

ciles 4-5 mm. longi dense pilosi; perianthii segmenta oblongo-

linearia obtusa fere 5 mm. longa extus sparse pilosa. — Panama:

Volcan de Chiriqui, Prov. Chiriqui, alt. 2,250 meters, July 13, 1938,

Mrs. M. E. Davidson 953 (type in Herb. Field Mus.); "flowers

cream."

Evidently a relative of Smilax Purpusii Brandegee, native in

Chiapas, but sufficiently distinct specifically, and well isolated

geographically.

ZINGIBERACEAE

Renealmia chiriquina Standl., sp. nov. — Herba erecta 45-75

cm. alta, caule crassiusculo in sicco striato; folia pauca, vaginis

8 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. 22

longissimis laxe vaginantibus arete striato-nerviis, apice subito con-

tractis et rotundatis; lamina sessilis anguste lanceolato-oblonga 8-18

cm. longa 2.5-4 cm. lata subabrupte anguste acuminata crasse

chartacea glabra; caulis fertilis fere 40 cm. altus, foliis omnibus ad

vaginas rigidas 5-6 cm. longas reductis; inflorescentia parva 2.5 cm.

longa et aequilata densa, bracteis in sicco pallidis ovalibus costato-

nervosis 1.5-2 cm. longis apice rotundatis et breviter caudato-

apiculatis, rhachi brevi ut pedunculus dense minute patenti-pilosula,

pedunculis crassis 3 cm. longis; bracteolae in involucellum cam-

panulatum 7 mm. longum brevissime lobatum coalitae, floribus

sessilibus; ovarium columnare 2.5 mm. longum tomentulosum. —

Panama: In rain forest, Bajo Chorro, Boquete District, Provincia

de Chiriqui, alt. 1,800 meters, "flowers light yellow," March 7, 1938,

Mrs. M. E. Davidson 386 (type in Herb. Field Mus.).

The plant is unusual in the genus, at least as compared with

Central American representatives, because of the remarkably small

leaf blades.

PIPERACEAE

Lindeniopiper Williamsii Trelease, sp. nov. — Arbuscula ramosa,

ramis fere e basi nascentibus nodosis, internodiis brevibus gracilibus

puberulis; folia oblonga longiacuminata, basi oblique cordulato-

auriculata, lobo longiore petiolum occultante, 8-9 cm. longa 1.5-2.5

cm. lata, multiplinervia, nervis 3 fere basalibus adjectis, nervis

supra basin folii ca. 7X2 angulo fere recto abeuntibus, subtus

pallidiora plus minusve puberula, petiolo 5 mm. longo puberulo;

spicae ramulum brevem sympodialem 1-foliatum terminantes 25

mm. longae, pedunculo 10 mm. longo; bracteae cucullatae; baccae

subglobosae glandulosae; stigmata 3 lata sessilia. — Mexico: Coatza-

coalcos, Veracruz, Llewelyn Williams 8386 (type in Herb. Field Mus.).

Peperomia cambuquirana Trelease, sp. nov. — Herba parvula

glabra stolonifera, caule filiformi; folia alterna lanceolato-elliptica

vel (infima) subovata obtusa, superiora sensim acuta vel sub-

acuminata, 2-4 cm. longa 1 cm. lata, subobscure trinervia, petiolo

filiformi 10 mm. longo; spicae vix 10 mm. longae atque 2 mm.

crassae, pedunculo 3 mm. longo. — Brazil: Matta da Empreza,

Cambuquira, State of Minas Gerais, H. Mello Barreto 7235 (type in

Herb. Field Mus.).

Peperomia coatzacoalcosensis Trelease, sp. nov. — Ut videtur

herba parva ramosa arboricola, internodiis brevibus gracilibus bre-

viter villosis, inferioribus glabrescentibus; folia alterna anguste

STUDIES OF AMERICAN PLANTS — IX 9

lanceolata utrinque sensim acuta, ca. 2.5-4 cm. longa atque 1 cm.

lata, utrinque plus minusve molliter pilosa, obscure trinervia,

petiolo 2 mm. longo pubescente; inflorescentia non visa. — Mexico:

Fortune, Coatzacoalcos, Veracruz, alt. 30-50 meters, Llewelyn

Williams 8509 (type in Herb. Field Mus.).

Peperomia erasmiaeformis Trelease, sp. nov. — Herba majus-

cula stolonifera erecta simplex glabra, caule crassiusculo 5 mm.

crasso nodoso, internodiis brevibus; folia pauca ad apicem caulis

aggregata anguste lanceolata utrinque acuta 18-20 cm. longa 3 cm.

lata, pinnatim ca. 13-nervia, subtus aliquanto pallidiora, petiolo

1-3 cm. longo; spicae plures late divaricatae atque paniculam latam

foliis longiorem apertam efformantes 80 mm. longae 3 mm. crassae,

pedunculo 5 mm. longo; ovaria anguste oblonga, scutulo acuto erecto

infra medium stigmatifero. — Venezuela: Cloud forest, Rancho

Grande, State of Aragua, alt. 1,200-1,500 meters, H. Pittier 13985

(type in Herb. Field Mus.).

Peperomia flagrans Trelease, sp. nov. — Scandens majuscula

glabra carnosa, internodiis brevibus crassis; folia alterna elliptico-

subovata subacuminata, basi obtusa, 9-10 cm. longa 4-5 cm. lata,

in sicco opaca ca. trinervia, petiolo 5 mm. longo crasso; spicae sin-

gulae oppositifoliae erectae obscure rubrae 100-150 mm. longae

8 mm. crassae, pedunculo 10-15 mm. longo; bracteae rotundato-

peltatae; baccae rotundatae, stigmate subapicali. — Ecuador: Above

Balsapampa, alt. 2,600 meters, Rimbach 847 (type in Herb. Field

Mus.).

Peperomia Johnstonii Trelease, sp. nov. — Herba modica plus

minusve persistente sed obscure molliter pilosa, caule 2-3 mm.

crasso; folia alterna elliptico-obovata rotundata vel subacuta, basi

acuta, 34 mm. longa 20 mm. lata, in sicco translucente trinervia

atque venulosa, petiolo 10-15 mm. longo; inflorescentia non visa. —

Guatemala: Volcan de Agua, Dept. Sacatep^quez, J. R. Johnston

220 (type in Herb. Field Mus.).

Peperomia Langsdorffii Miq. var. resacana Trelease, var.

nov. — Planta alta, caulibus gracillimis 1-2 mm. crassis obscuriuscule

subvillosis; folia lanceolata utrinque acuta 4-5 cm. longa 1.5-2 cm.

lata 5-nervia, petiolo filiformi 5-10 mm. longo. — Brazil: Resaca,

Belo Horizonte, State of Minas Gerais, H. Mello Barreto 7234 (type

in Herb. Field Mus.).

Peperomia santa-helenae Trelease, sp. nov. — Herba majuscula

aliquanto caespitosa molliter villosa, caule aliquanto superne genicu-

10 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. 22

lato, inferne 2-3 mm. crasso; folia alterna elliptica utrinque subacuta

2-3.5 cm. longa 1-1.5 cm. lata trinervia, in sicco coriacea atque subtus

flavescentia, petiolo ca. 5 mm. longo; spicae axillares (propter folia

delapsa spurie paniculatae) 50 mm. longae 1 mm. crassae, pedunculo

gracili 10-15 mm. longo. — Guatemala: Santa Helena, Dept. Tec-

pam, J. R. Johnston 421 (type in Herb. Field Mus.).

Peperomia Uphofii Trelease, sp. nov. — Herba modice parva

rhizomatoso-assurgens glabra, caule gracili vix 2 mm. crasso; folia

alterna ovata acuminata, basi subtnmcata atque subito breviterque

acuta, 3.5-6.5 cm. longa 2.5-5 cm. lata submultiplinervia in sicco

tenerrima translucentia, petiolo 2.5 vel in foliis inferioribus 10 mm.

longo usque ad basin alato; spicae 1 vel 2 subapicales 100 mm. longae

1 mm. crassae, bracteis rotundato-peltatis; baccae ovoideae, stylo

brevi, stigmate apicali. — El Salvador: On wet rocks near San

Salvador, J. C. T. Uphof (type in Herb. Field Mus.).

Piper corte-scabrum Trelease, sp. nov. — Frutex late divari-

catus 5-metralis ubique minute scaber, internodiis superioribus

brevibus gracilibus; folia lanceolata vel lanceolato-oblonga acu-

minata, basi oblique subobtusa, ca. 15 cm. longa atque 5 cm. lata,

e 2 tertiis inferioribus pinnatinervia, nervis ca. 5X2, petiolo vix 5

mm. longo; spicae in statu juvenili 15 mm. longae 3 mm. crassae,

pedunculo 5 mm. longo. — Mexico: Fortune, Rio Coatzacoalcos,

Veracruz, Llewelyn Williams 9034 (type in Herb. Field Mus.).

Piper fortunyoanum Trelease, sp. nov. — Frutex glaber vix

bimetralis; folia elliptica acuminata basi inaequaliter cordulata

15-20 cm. longa 7-10 cm. lata ubique pinnatinervia, in sicco tenuia,

petiolo 2.5-3 cm. longo in tota longitudine alato; spicae juveniles

25 mm. longae 3 mm. crassae apiculatae, pedunculo 5-10 mm. longo.

— Mexico: Fortune, Rio Coatzacoalcos, Veracruz, Llewelyn Williams

8554 (type in Herb. Field Mus.).

Piper Henscheni C. DC. var. Barretoi Trelease, var. nov.—

Frutex trimetralis e forma typica foliis fere orbicularibus 11.5 cm.

longis 8.5 cm. latis differt; spicae 50 mm. longae 3 mm. crassae,

pedunculo 10 mm. longo. — Brazil: Domingos Pisoni, Leopoldina,

State of Minas Gerais, H. Mello Barreto 7250 (type in Herb. Field

Mus.).

Piper oblique-ovatum Trelease, sp. nov. — Frutex ut videtur

multiramosus glaber, internodiis superioribus brevibus gracilibus

striatis; folia lanceolato-ovata vel saepius late ovata acuta, basi

STUDIES OF AMERICAN PLANTS — IX 11

gibboso-cordata, lobo majore petiolum occultante, 10-12 cm. longa

4-6 cm. lata, 5-nervia, petiolo 10 mm. longo; inflorescentia non

visa.— Guatemala: Concepcion, Dept. Chimaltenango, J. R. John-

ston 557 (type in Herb. Field Mus.).

Piper perobumbratum Trelease, sp. nov. — Piper geniculatum

of authors as to Brazil, in part. Frutex glabratus foliis inter P.

exsertum atque P. obumbratum intermedius; folia elliptica vel elon-

gato-elliptica ca. 25-27 cm. longa atque 10 cm. lata, latere longiore

basi rotundato vel subcordulato, non in petiolum cuneato-decurrens.

—Brazil: Rio de Janeiro, Pohl 4772 (type in herb. Mus. Vienna)

and 4777.

Piper resacanum Trelease, sp. nov. — Glabra nodosa bimetra-

lis, internodiis brevibus modice gracilibus; folia lanceolata acuta,

basi subcuneata, 9-13 cm. longa 3 cm. lata ubique pinnatinervia,

nervis primariis ca. 8x2, petiolo 5 mm. longo; spicae 15 mm. longae

3 mm. crassae breviter apiculatae, pedunculo 10 mm. longo; brac-

teae pallidae, centre obscuro. — Brazil: Resaca, Belo Horizonte,

State of Minas Gerais, H. Mello Barreto 7251 (type in Herb. Field

Mus.).

Piper santa-barbaranum Trelease, sp. nov. — Frutex glaber

nodosus trimetralis, internodiis superioribus brevibus gracilibus;

folia lanceolato-elliptica 15 cm. longa 5-6 cm. lata, vel reducta lanceo-

lata 12 cm. longa 3 cm. lata, sensim subacuminata, basi aequaliter

acuta, e tertio infimo pinnatinervia, nervis 3X2 vel pare obscuro

altero adjecto, petiolo 10 mm. longo infra medium vaginato; spicae

45 mm. longae 4 mm. crassae obtusae, pedunculo 7 mm. longo. —

Brazil: Santa Barbara, Serra do Caraca, State of Minas Gerais, H.

Mello Barreto 7244 (type in Herb. Field Mus.).

Piper ubiqueasperum Trelease, sp. nov. — Frutex vix bimetralis

ubique minute scabro-pubescens; folia oblonga 18 cm. longa 7 cm.

lata, interdum oblongo-subovata atque 20 cm. longa et 8 cm. lata,

acuminata, basi oblique obtusa, e medio inferiore pinnatinervia,

nervis ca. 5x6, petiolo vix 5 mm. longo; inflorescentia non visa. —

Mexico: Fortuno, Rio Coatzacoalcos, Veracruz, Llewelyn Williams

8902 (type in Herb. Field Mus.).

Piper ubiquescabridum Trelease, sp. nov. — Frutex ca. tri-

metralis ubique minute scabro-pubescens, internodiis superioribus

brevibus gracilibus; folia late elliptica acuminata, basi paullo in-

aequilateralia, latere breviore rotundato, 18-20 cm. longa 9-10 cm.

12 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. 22

lata, e medio inferiore pinnatinervia, nervis 6X2, petiolo ca. 15 mm.

longo; spicae 100 mm. longae 3 mm. crassae acutae, pedunculo 15

mm. longo. — Mexico: Fortune, Rio Coatzacoalcos, Veracruz, alt.

30-50 meters, Llewelyn Williams 8821 (type in Herb. Field Mus.).

Piper viminifolium Trelease, sp. nov. — Frutex bimetralis

nodosus glaber, internodiis brevibus gracilibus; folia anguste lanceo-

lata utrinque longe acuta, 10-16 cm. longa, 1.5-3 cm. lata, ubique

pinnatinervia, nervis in sicco flavescentibus vel rubescentibus,

petiolo 5 mm. longo; spicae 35-40 mm. longae 3 mm. crassae, pedun-

culo 5 mm. longo. — Brazil: Botanic Garden, Belo Horizonte,

State of Minas Gerais, H. Mello Barreto 7248 (type in Herb. Field

Mus.). •

JUGLANDACEAE

Engelhardtia guatemalensis Standl., sp. nov. — Arbor parva

vel alta, ramulis gracilibus elevato-lenticellatis subteretibus, novellis

in sicco fusco-brunneis dense brunneo-lepidotis, serius glabratis, ad

nodos interdum breviter denseque hirsutis; folia opposita magna

petiolata, rhachi gracili lepidota vel fere glabra; foliola vulgo 14

vel 16 anguste lanceolato-oblonga 9-20 cm. longa vel ultra 2.3-5 cm.

lata longe angusteque attenuata, basi paullo obliqua acuta, inte-

gerrima vel rare serrata, supra viridia ad costam sparse hispidula

vel fere omnino glabra, costa nervisque prominentibus vel promi-

nulis, subtus pallida glaucescentia ubique dense minute adpresso-

lepidota, petiolulis crassis 2-3 mm. tantum longis.— Guatemala

(Dept. Alta Verapaz): Wet forest near Tactic, alt. 1,500 meters,

April 5, 1939, Paul C. Standley 70477 (type in Herb. Field Mus.),

70507, 70493. Region of Chelae, northeast of Carcha, on the new

road to Pete"n, 1,500 meters, Standley 70370, 70379.

It was a great surprise to the writer to discover in the mountains

of the Coban region a tree of the genus Engelhardtia. It was still

more of a surprise to find the tree very common in the region, one

in which so much collecting had been done over a period of many

years. It still seems strange that such an observant and discrimi-

nating collector as von Tuerckheim should not have collected

specimens, but if he did so, they have not come to the writer's

attention, and no report has been published of such a tree from the

forests of Guatemala.

The available material, unfortunately, is sterile, and it was

impossible to discover trees with either flowers or fruits, although

many hundreds of individuals were observed along the Pete'n road

STUDIES OF AMERICAN PLANTS— IX 13

and along the roads at various places in the Tactic region. The

trees are easy of recognition, even from a considerable distance,

when once noticed, because of the crimson coloring of the young

foliage. In this respect they suggest the amche (Rhus striata) so

common in the same region. Moreover, when the foliage is inspected

closely, it is so much like that of this highly poisonous tree that it

requires considerable courage to touch the leaves. Rhus, of course,

has alternate, not opposite leaves, but otherwise the leaves, espe-

cially in their red coloration, are singularly alike, at least in the

field. Several Indians and ladinos who were questioned about the

tree stated that it was common in Alta Verapaz, but that they

knew no local name for it. This is really remarkable in a region

where the Kekchi people usually have a name for every insignificant

weed.

In America two species of Engelhardtia have been known pre-

viously, E. pterocarpa (Oerst.) Standl., of Costa Rica, and E. mexi-

cana Standl., of Tabasco. E. pterocarpa differs from the Guatemalan

tree in its alternate leaves with less numerous leaflets on long petio-

lules. The Guatemalan species would be expected, perhaps, to be

conspecific with the Tabasco one, but comparison shows that it

apparently is fully distinct. In E. mexicana the leaflets are on much

longer petiolules and are conspicuously rounded on one side at the

base. Besides, they are less numerous, and most of them have a

small basal lobe that is closely recurved against the lower surface of

the blade. It is probable that when the fruit of E. guatemalensis is

collected, it will be found to afford additional characters.

FAGACEAE

Quercus boquetensis Standl., sp. nov. — Arbor 6-12-metralis,

ramulis nigrescentibus glabris lenticellis pallidis elevatis notatis,

sat dense foliatis; folia parva breviter petiolata subcoriacea integra,

petiolo gracili 2-4 mm. longo glabro; lamina lineari-lanceolata 3.5-7

cm. longa 1-1.5 cm. lata longe sensimque attenuata, basi acuta vel

acuminata, utrinque plus minusve lucida, supra in sicco fusca, costa

subdepressa, nervis venisque non elevatis, subtus concolor, ad cos-

tam gracilem elevatam hinc inde breviter piloso-barbata, aliter

glabra, nervis venisque obscuris; pedunculi feminei in axillis superiori-

bus crassi vix ultra 3 mm. longi glabri; cupula breviter late hemi-

sphaerica ca. 15 mm. lata atque 6 mm. alta, squamis multiseriatis

triangulari-ovatis obtusis brunnescenti-marginatis dorso dense mi-

nute ochraceo-sericeis; glans ovoideo-globosa ca. 12 mm. longa et

14 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. 22

aequilata, apice late rotundata et umbonata, ubique dense sericea.

—Panama: Open hillside, Boquete, Provincia de Chiriqui, alt.

1,650 meters, June 26, 1938, Mrs. M. E. Davidson 780 (type in Herb.

Field Mus.).

Quercus Davidsoniae Standl., sp. nov. — Arbor excelsa, ramulis

bnmneo-fuscis crassis sat dense pilis patentibus sordidis hirsuto-

pilosis, internodiis brevibus; folia majuscula breviter petiolata sub-

coriacea, petiolo crasso 10-14 mm. longo piloso vel glabrato; lamina

lanceolato-oblonga vel elliptico-oblonga 14-19 cm. longa 6-7 cm.

lata acuminata vel longiacuminata, basin versus paullo angustata,

basi ipsa anguste rotundata vel truncata, saepe breviter cordata,

supra in sicco fuscescenti-brunnescens glabra sublucida, costa

nervisque prominulis, subtus fere concolor, sublucida vel opaca, in

statu juvenili plus minusve minute stellato-pilosula, cito glabrata

vel fere glabra, costa gracili elevata, nervis lateralibus utroque latere

ca. 20 prominentibus rectis angulo semirecto adscendentibus in

marginem desinentibus, venulis vix prominulis laxe reticulatis,

margine toto remote depresso-serrato; pedunculi feminei ex axillis

superioribus nascentes crassissimi ca. 1.5 cm. longi; cupula hemi-

sphaerica magna 4 cm. lata 2 cm. et ultra alta, squamis multiseriatis

arete adpressis triangulari-ovatis anguste acutatis, apice ipso

anguste obtuso, dorso densissime ochraceo-sericeis; glans immatura

ca. 2.5 cm. alta atque 3 cm. lata, subglobosa, apice fere truncata et

profunde depressa subumbonata, primo dense ochraceo-sericea,

serius glabrata. — Panama: Boquete, Provincia de Chiriqui, alt.

1,200 meters, July 6, 1938, Mrs. M. E. Davidson 864 (type in Herb.

Field Mus.).

A handsome addition to the known large-fruited oaks of Central

America, and scarcely to be confused with any of the species of this

group described and so elegantly illustrated by Trelease in his

monograph of American oaks.

MORACEAE

Cecropia orinocensis Standl., sp. nov. — Petiolus (perfectus

non visus) ultra 15 cm. longus striatus minute subsparseque puberulo-

tomentulosus; lamina crasse membranaca ambitu suborbicularis ca.

35 cm. longa breviter 9-loba, supra in sicco griseo-viridis sat dense

scaberula, subtus pallidior brunnescenti-grisea ubique minutissime

subadpresse puberulo-tomentella, peltata, lobis latis apice rotundatis

vel obtusissimis, costa gracili subtus elevata utroque latere nervos

ca. 30 fere rectos vel leviter incurves graciles prominentes emittente,

STUDIES OF AMERICAN PLANTS — IX 15

venulis crebris transversis parallelis fere rectis; inflorescentia feminea

crasse 4.5 cm. longe vel ultra pedunculata, pedunculo glabro vel

glabrato, spatha 8.5 cm. longa 1.5 cm. lata abrupte attenuata dense

minute puberulo-tomentella; spicae 3-4 sessiles 5-5.5 cm. longae

obtusae 5-6 mm. crassae. — Venezuela: Mouth of Rio Cano Carida,

humid forest, Rio Orinoco, Amazonas Territory, alt. 100 meters,

January, 1930, E. G. Holt & W. Gehriger 248 (type in U. S. Nat.

Herb.).

Vernacular name "yagrumo." Like most species of the genus,

this has no particularly noteworthy characters, but thorough study

has failed to identify it with any species described or reported from

northern South America.

Ficus Davidsoniae Standl., sp. nov.— Arbor 9-18-metralis fere

omnino glabra, ramulis crassis, internodiis brevibus vel brevissimis;

stipulae caducae triangulari-oblongae ca. 1.5 cm. longae anguste

sensim attenuatae rigidae in sicco fuscae glabrae; folia mediocria

breviter petiolata coriacea, petiolo crasso 6-9 mm. longo; lamina

obovato-oblonga 11-14.5 cm. longa 5-6 cm. lata obtusa, basin

obtusam vel anguste rotundatam versus sensim angustata, supra in

sicco sublucida, costa elevata, nervis venisque prominulis, subtus

concolor, costa crassiuscula elevata, nervis lateralibus utroque latere

ca. 15 teneris angulo lato fere recto abeuntibus fere rectis, prope

marginem arcuato-conjunctis, aliis tenuioribus parallelis interpositis,

venulis prominulis arctissime reticulatis; receptacula sessilia gemin-

ata subglobosa fere 1 cm. diam. glabra, involucre bilobo inaequali

arete adpresso fere totum receptaculum involvente, ostiolo parvo

elevato. — Panama: Boquete, Provincia de Chiriqui, alt. 1,200 meters,

May 20, 1938, Mrs. M. E. Davidson 688 (type in Herb. Field Mus.).

The tree is characterized specifically by the rather large, many-

nerved, coriaceous leaves of somewhat unusual shape, and by the

sessile receptacles with a large involucre which, at least at first,

almost completely covers the fruits.

Ficus Lehmannii Standl. Field Mus. Bot. 4: 202. 1929.

Definite locality data were not available when this species was

published, but they have now been supplied by Mr. Ellsworth

P. Killip from Lehmann's field notes: "Colombia. Grows in open

wood formations on the plateau of Popayan, 1,500-1,800 meters.

Up to 10 meters high, with a close, round crown. Leaves leathery,

dark green, slightly lustrous."

16 FIELD MUSEUM OF NATURAL HISTORY— BOTANY, VOL. 22

Ficus mattogrossensis Standl., sp. nov. — Arbor alta, ramulis

crassiusculis glabris, internodiis brevibus; stipulae ca. 12 mm. longae

caducae triangulari-lanceolatae longiattenuatae dorso dense adpresso-

pilosae; folia majuscula longipetiolata coriacea, petiolo crassiusculo

3-6 cm. longo glabro; lamina oblanceolato-oblonga vel obovato-

oblonga 11-20 cm. longa 4-7 cm. lata apice rotundata, basin versus

sensim angustata, basi ipsa acuta vel cuneata, supra in sicco sub-

fusco-viridis glabra, nervis non elevatis, subtus pallidior, glabra sed

saltern in sicco ubique sat dense minute pallide papillosa, basi tri-

nervia vel obscure 5-nervia, costa crassa prominente, nervis laterali-

bus utroque latere ca. 10 valde obliquis teneris prominentibus

pallidis angulo ca. semirecto adscendentibus subarcuatis, juxta

marginem arcuato-conjunctis, venulis prominulis arete reticulatis;

receptacula geminata breviter pedunculata ovali-globosa 17-20 mm.

longa ca. 15 mm. lata, basi et apice rotundata, dense minute puberulo-

tomentella, ostiolo valde prominente ca. 3 mm. lato, pedunculo

crassissimo vix 3 mm. longo, involucre bilobo extus subdense ad-

presso-piloso, lobis latis apice rotundatis ca. 6 mm. longis, intus

dense sericeis. — Brazil: Lagoinha, C. Grande, Matto Grosso,

caminho para Capao Bonito, September, 1936, W. Archer & Aug.

Gehrt 61 (type in U. S. Nat. Herb.; duplicate in Herb. Field Mus.).

Ficus zarzalensis Standl., sp. nov. — Arbor, ramulis crassis,

novellis pallide cinnamomeis glabris, internodiis brevissimis; stipu-

lae bene evolutae non visae, juvenes ca. 8 mm. longae oblongo-

lanceolatae attenuato-acuminatae dense minute scaberulo-tomen-

tellae et dorso adpresso-hirsutae, deciduae; folia mediocria longe

petiolata coriacea, petiolo crassiusculo 2-4 cm. longo glabro; lamina

obovato-oblonga 8-11 cm. longa 4-5 cm. lata, apice obtusissima vel

anguste rotundata, basin versus paullo angustata, basi ipsa anguste

obtusa, utrinque glabra, supra in sicco pallide brunnescens, nervis

non elevatis, subtus fere concolor, basi trinervia vel obscure 5-

nervia, costa crassiuscula elevata, nervis lateralibus utroque latere

ca. 7 arcuatis teneris angulo latiusculo abeuntibus prope marginem

arcuato-conjunctis, venulis vix prominulis subarcte reticulatis;

receptacula geminata breviter pedunculata globosa 1 cm. diam.

basi et apice rotundata minute puberula atque scabra, ostiolo

elevato, margine incrassato, pedunculo crasso vix ultra 3 mm. longo,

involucro bilobo extus glabro, lobis apice late rotundatis ca. 3 mm.

longis. — Colombia: Low forest east of Zarzal, Departamento de

El Valle, Cauca Valley, 970-1,050 meters, July, 1922, F. W. Pennell,

STUDIES OF AMERICAN PLANTS — IX 17

E. P. Killip & T.E. Hazen 8391 (type in U. S. Nat. Herb.; fragment

in Herb. Field Mus.).

Trophis nubium Standl., sp. nov. — Frutex vel arbor 3-6-

metralis, ramulis gracillimis subflexuosis brunneis vel brunnescen-

tibus minute puberulis vel glabris, internodiis brevibus plerumque

1-2 cm. longis; stipulae deciduae anguste triangulares 3 mm. longae

sparse breviter pilosulae; folia breviter petiolata crasse membranacea,

petiolo gracili 6-9 mm. longo minute puberulo vel glabro; lamina

lineari-lanceolata 8-14 cm. longa 1.5-2.5 cm. lata longissime angus-

tissime attenuato-acuminata, acumine fere lineari usque 2.5 cm. longo

obtuso, basi obtusa vel subacuta, glabra, costa supra impressa,

nervis venisque vix prominulis, subtus fere concolor, costa tenera

elevata, nervis lateralibus utroque latere ca. 15 angulo lato abeunti-

bus prominentibus tenerrimis, venulis prominulis arete reticulatis,

margine toto saltern supra tertiam inferiorem argute serrate; racemi

feminei axillares pauciflori laxi breviter pedunculati pedunculo

incluso ca. 2 cm. longi usque 10-flori, rhachi dense minute tomentella,

pedicellis crassiusculis ca. 2-3 mm. longis; fructus juvenilis ovali-

globosus ca. 4 mm. longus basi rotundatus minutissime sparse

sericeus vel glabratus; styli rami filiformes 3-5 mm. longi puberuli.

—Guatemala: Second-growth thicket, Volcan de Zunil, Dept.

Quezaltenango, alt. 1,650 meters, August 3, 1934, Alexander F.

Skutch 925 (type in Herb. Field Mus.). In forest, Volcan de Atitlan,

Dept. Suchitepe"quez, alt. 2,190 meters, October, 1934, Skutch 1511.

The narrow leaves at once distinguish this from all other Central

American and Mexican species of Trophis.

LORANTHACEAE

Dendrophthora guatemalensis Standl., sp. nov. — Frutex

parasiticus aphyllus sat dense ramosus glaber 17 cm. altus et ultra,

ramis crassiusculis rigidis fragilibus teretibus, internodiis 7-15 mm.

longis in sicco longitrorsum rugosis flavidis dense minutissime tuber-

culatis, squamis vix 1 mm. longis apice rotundatis; inflorescentiae

axillares breviter crasseque pedunculatae 1-3-articulatae, spicis

femineis vulgo articulo 1-floro terminatis, flore arete sessili trimero;

sepala 3 clausa late triangularia obtusa. — Guatemala: Mountain

slopes above Finca Seamay, Alta Verapaz, February 14, 1939, C. L.

Wilson 204 (type in Herb. Field Mus.).

Phoradendron Davidsoniae Standl., sp. nov. — Frutex para-

siticus omnino glaber ramosus, ramis suberectis subteretibus vel

18 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. 22

obscure compressis in sicco fuscis vel brunnescentibus, internodiis

2-3 cm. longis; cataphylla basi tantum rami inserta adpressa 4-5

mm. longa; folia inter minora fere sessilia crasse coriacea lineari-

oblanceolata 3-6.5 cm. longa 5-11 mm. lata obtusa, basin versus

sensim anguste attenuata, basi petioliformi, obscure trinervia; spicae

breviter pedunculatae in axillis solitariae 1.5-3 cm. longae 3-4 mm.

crassae 3-4-articulatae, articulis subclavatis vulgo 4-floris, floribus

4-seriatis; fructus subglobosus ut videtur albus 4 mm. diam. laevis.

—Panama: Boquete, Provincia de Chiriqui, alt. 1,140 meters, June

24, 1938, Mrs. M. E. Davidson 740 (type in Herb. Field Mus.).

Volcan de Chiriqui, Provincia de Chiriqui, July, 1938, Davidson 923.

POLYGONACEAE

Coccoloba Zernyi Standl., sp. nov. — Frutex, ramulis gracil-

limis subteretibus dense puberulis vel strigillosis, internodiis ut

videtur brevibus; ochreae (e parte superiore ramuli tantum visae)

vix ultra 2 mm. longae laxae dense strigosae parum obliquae; folia

parva breviter petiolata coriacea, petiolo gracili ca. 5 mm. longo

paullo strigoso; lamina ovata vel oblongo-ovata 4-5.5 cm. longa

1.7-2.5 cm. lata breviter sensim acuminata, basi obtusa, supra in

sicco fusco-brunnescens sublucida ad costam prominentem sparse

pilosula, aliter glabra, nervis venisque vix manifestis, subtus fere

concolor sparse minute patenti-pilosula, costa gracili elevata, nervis

lateralibus utroque latere ca. 10 tenerrimis prominulis arcuatis

angulo fere recto adscendentibus, venulis vix manifestis; spicae

paniculatae graciles usque 11 cm. longae flexuosae laxe fere

ad basin multiflorae ca. 3 mm. latae, rhachi dense minute patenti-

pilosa, floribus solitariis, pedicellis filiformibus glabris ochreolam

vix aequantibus vel interdum fere duplo longioribus, ochreolis

tenuibus brunnescentibus membranaceis strigillosis 1-1.5 mm.

longis; sepala ovali-ovata 1.3 mm. longa ad anthesin patentia obtusa

extus puberula. — Brazil: Amazonas, in secondary forest at the

foot of the highlands, Taperinha, near Santarem, August 13, 1927,

H. Zerny 890 (type in Herb. Field Mus.).

Noteworthy for the small and neat leaves, and the abundant,

laxly paniculate, long and slender racemes.

NYCTAGINACEAE

Torrubia parvifolia Standl., sp. nov. — Frutex vel arbor, ramulis

crassiusculis primo minute subdense ferrugineo-tomentellis, cito

glabratis, brunneo-fuscis, subteretibus, internodiis brevibus; folia

STUDIES OF AMERICAN PLANTS — IX 19

parva breviter petiolata rigide coriacea opposita vel ternata, petiolo

vix ultra 2 mm. longo ferrugineo-tomentello vel glabrato; lamina

anguste elliptica, oblongo-ovata vel rare rotundato-elliptica 1.5-

2.5 cm. longa 7-12 mm. lata obtusa vel acutata, apice ipso obtuso,

basi saepe subobliqua obtusa vel subacuta, lucida, costa supra

gracillima prominente, nervis obsoletis, subtus in sicco brunnescens,

costa vix prominulo, nervis venisque obsoletis, margine plus minusve

revoluto; inflorescentia (bene evoluta non visa) parva capituliformis

6-7 mm. longe pedunculata ca. 6-flora, pedunculo ferrugineo-tomen-

tello vel glabrato, floribus sessilibus vel subsessilibus; perianthium

ca. 2 mm. longum anguste campanulatum glabratum. — Brazil: Alto

da Serra, Sao Paulo, Mansueto Koscinski 162 (Herb. Secc. Bot.

Inst. Biol. S. Paulo 31062, type; fragment in Herb. Field Mus.).

An unusually well marked species, easy of recognition because

of the very small and lustrous, coriaceous leaves.

CARYOPHYLLACEAE

Arenaria Quirosii Standl., sp. nov. — Herba ut videtur erecta,

caespitosa(?), caulibus crassiusculis simplicibus rectis dense foliatis

usque 6 cm. tantum altis dense pilis brevibus albidis patentibus

hirtellis, internodiis brevibus; folia parva sessilia vel in petiolum

brevissimum contracta late elliptica herbacea 3-4 mm. longa apice

obtusa vel obtusissima atque acuminato-apiculata, basi breviter

angustata, supra dense breviter patenti-pubescentia, subtus saltern

ad costam breviter pubescentia, 1-nervia; flores axillares singuli,

pedicellis folia aequantibus vel paullo longioribus dense hirtellis;

sepala 2.5-3.5 mm. longa lanceolato-oblonga vel oblongo-ovata

subulato-acuminata pallido-marginata viridi-carinata dorso patenti-

pubescentia; petala ut videtur nulla; semina ovali-globosa lucidis-

sima 0.7 mm. longa atro-ferruginea fere laevia. — Costa Rica: Faldas

del Volcan de Irazu, September 15, 1938, Manuel Quirds C. 812

(type in Herb. Field Mus.).

It is strange that such a distinct plant as this, growing in a

region visited by almost all botanists who have worked in Costa

Rica, should have been overlooked, but perhaps its diminutive size

is responsible for the oversight. It is not similar to any of the few

species known previously from Central America.

RANUNCULACEAE

Thalictrum panamense Standl., sp. nov. — Herba erecta elata

60-120 cm. alta, caulibus teretibus gracilibus brunnescentibus atque

20 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. 22

glaucescentibus glabris, internodiis solemniter elongatis; folia sat

magna, superiora longiuscule petiolata, basalia non visa, rhachibus

gracillimis glabris vel microscopice puberulis; foliola numerosa parva

membranacea ca. 2 mm. longe petiolulata rhombicoflabellata pler-

umque 8-17 mm. longa atque 5-12 mm. lata epeltata basi rotundata

vel obtusa, vulgo breviter trilobata, rare subintegra vel 5-crenata,

supra intense viridia minutissime puncticulata, subtus glauca glabra

vel sparse minutissime puberula, venis reticulatis sed vix elevatis;

inflorescentia foliata ampla, pedicellis fructiferis ca. 2 cm. longis

filiformibus; achaenia 4-5 mm. longa oblique fusiformia compressa

incrassato-marginata glabra basi acuta atque obliqua, apice acuta

atque breviter rostrata, utrinque insigniter tricostata, stylis fili-

formibus usque 8 mm. longis. — Panama: Boquete, Prov. Chiriqui,

alt. 1,350 meters, June 26, 1938, Mrs. M. E. Davidson 791 (type

in Herb. Field Mus.).

This is apparently the only species of Thalictrum thus far col-

lected in the mountains of Panama. The single Costa Rican species,

T. Lankesteri Standl., has more or less peltate and much broader

leaflets.

MENISPERMACEAE

Disciphania cardiophylla Standl., sp. nov. — Caulis gracilis

striatus pilis rigidulis patentibus pilosus, internodiis elongatis; folia

majuscula longipetiolata herbaceo-membranacea, petiolo gracili ca.

5 cm. longo sparse hirsute; lamina late cordato-ovata 6.5-10 cm.

longa 4.5-7 cm. lata, apice abrupte breviter cuspidato-acuminata,

acumine usque 8 mm. longo, basi breviter aperte cordata, in sicco

nigrescens, supra lucida sparse saltern ad costam hirsuta, subtus

ubique sat dense hirsuta, e basi 7-nervia, venis utrinque prominenti-

bus gracilibus laxe reticulatis; racemi masculi axillares solitarii vel

geminati gracillimi usque 7 cm. longi sat dense pilis brevibus pilosi,

floribus numerosis remotis sessilibus, bracteis minutis subulatis;

perianthium extus sparse breviter pilosum, sepalis basi cupuliformi-

conjunctis ca. 2.5 mm. longis, parte libera oblongo-ovata stellatim

patente vel subrecurva intus glabra; stamina 3. — Mexico: Coscoma-

tepec, Veracruz, May 10, 1937, E. Matuda 1335 (type in herb. Univ.

Michigan; fragment in Herb. Field Mus.).

Most species of the genus are South American, and the group

has been recorded from Mexico only recently. D. mexicana Bullock

(Kew Bull. 388. 1936), of the State of Mexico, differs from the

present species in having deeply lobate leaves.

STUDIES OF AMERICAN PLANTS — IX 21

Hyperbaena brunnescens Standl., sp. nov. — Frutex scandens,

ramis crassis teretibus dense molliterque pilis patentibus aureo-

brunneis longiusculis pilosis, internodiis brevibus vel aliquanto

elongatis; folia majuscula longipetiolata subcoriacea, petiolo 4-6.5

cm. longo gracili vel crassiusculo apice incrassato; lamina ovata vel

lanceolata 13-16 cm. longa 5-8 cm. lata anguste acuminata, basi

subtruncata, late rotundata vel interdum tantum obtusa, supra

in sicco lucida fusca fere omnino glabra, nervis subimpressis, subtus

fere concolor brunnescens ubique dense pilis patentibus aureo-

brunneis brevibus molliter pilosa, basi 5-nervia, nervis elevatis

gracilibus, costa superne utroque latere nervos secundarios 1-2

emittente, venis prominulis transversis distantibus subparallelis;

cetera ignota. — Guatemala: Near Puerto Barrios, Dept. Izabal, in

wet thicket, at sea level, April-May, 1939, Paul C. Standley 73091

(type in Herb. Field Mus.). Also No. 73040 from the same locality.

During the past few years so many species of Hyperbaena have

been described from Mexico and Central America that more would

scarcely be expected there, but it may be that some are very local

in distribution. The present species is better marked than many

of the others, being easy of recognition because of the palmately

nerved leaves, covered beneath with a characteristic, dense, golden-

brown pubescence.

CAPPARIDACEAE

Steriphoma clara Standl., sp. nov. — Frutex 1-2-metralis

pauciramosus, ramis crassiusculis subteretibus dense tomento brun-

neo stellate subadpresso indutis, internodiis brevibus vel elongatis;

folia longipetiolata membranacea, petiolo gracili tereti 4-9 cm.

longo sparse vel dense stellato-tomentello; lamina oblongo-elliptica,

interdum obovato-elliptica, 8-16 cm. longa 3.5-7 cm. lata acuta vel

subabrupte acuminata, apice ipso filiformi-producto, basi obtusa

vel anguste rotundata, supra saltern in statu adulto glabra opaca,

subtus vix pallidior ubique pilis parvis stellatis pallidis sat dense

conspersa vel interdum glabrata; inflorescentia racemosa terminalis

dense multiflora ca. 17 cm. longa atque basi 5.5 cm. lata, bracteis

caducis filiformibus elongatis, pedicellis erectis plerumque 2.5-3.5

cm. longis tomento coccineo stellato adpresso dense obtectis; calyx

campanulatus 1.5 cm. longus basi rotundatus tomento aurantiaco-

coccineo stellato densissime obtectus, lobis late ovatis obtusis ca.

5 mm. longis; petala pallide lutea anguste oblonga obtusa breviter

e calyce exserta extus dense adpresseque stellato-tomentella; fila-

menta longiexserta pallida viridia, antheris 7 mm. longis. — Guate-

22 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. 22

mala: Thickets near Nueva Linda, halfway between Retalhuleu

and Champerico, Dept. Retalhuleu, alt. 120 meters, February 26,

1939, Paul C. Standley 66552 (type in Herb. Field Mus.).

The genus Steriphoma, most of whose few species are South

American, has not been found previously north of Panama, in

southern Darie"n, where, so far as I know, it has been collected but

once. The Panama species, S. macrantha Standl., differs from the

Guatemalan one in having substantially larger flowers.

Steriphoma clara is a handsome and exceptionally showy plant.

I had never before seen the genus growing, and when plants were

seen, distributed abundantly in thickets over the plains toward

Champerico, it was assumed that they represented some species of

Combretum, the spirelike racemes with their orange-red color having

at a short distance almost the same appearance as those of Combre-

tum Cacoucia, except for their lighter and brighter coloring.

SAXIFRAGACEAE

Jamesia americana Torr. & Gray, Fl. N. Amer. 1: 593. 1840.

In the United States this handsome shrub has a wide range,

from New Mexico and Arizona northward to Wyoming, but no

Mexican specimens were found when manuscript was prepared for

the Trees and Shrubs of Mexico. A single Mexican collection, alto-

gether typical, has come to hand recently: Salto Canyon, Babicora,

Chihuahua, July, 1937, Harde LeSueur 1265.

LEGUMINOSAE

Astragalus Gentry! Standl., sp. nov. — Herba ut videtur annua

prostrata e basi laxe ramosa, caulibus gracilibus ad anthesin ca. 15

cm. longis sparse pilis albis brevibus rigidulis adpressis strigillosis, .

internodiis paucis brevibus vel elongatis; stipulae ca. 3 mm. longae

e basi anguste triangulari longiattenuatae suberectae virides albo-

marginatae; folia parva ca. 1 cm. longe petiolata, rhachi ca. 2.5

cm. longa sparse adpresso-pilosa, foliolis subremotis ca. 15 crassius-

culis brevissime petiolulatis ovalibus vel obovato-ovalibus 3-6 mm.

longis 2.5-3.5 mm. latis apice late breviter emarginatis, basi rotun-

datis vel cuneato-obtusis, supra subglaucescentibus glabris, subtus

concoloribus sparse pilis brevibus albis strigillosis; racemi axillares

graciliter usque 6.5 cm. longe pedunculati laxi 1-2 cm. longi ca.

8-flori, pedicellis vix ultra 1 mm. longis, bracteis lineari-subulatis

pedicellis vix longioribus; calyx tubulosus extus dense albo-strigosus,

tubo ca. 4 mm. longo basi acutiusculo vel obtuso atque paullo obliquo

STUDIES OF AMERICAN PLANTS — IX 23

1.5 mm. lato, dentibus subaequalibus 1-1.5 mm. longis lineari-sub-

ulatis erectis; corolla ut videtur intense violacea ca. 8 mm. longa,

vexillo extus glabro angulo fere recto refracto. — Mexico: San Ber-

nardino, Rio Mayo, Sonora, in an arroyo among rocks, February,

1935, Howard Scott Gentry xo (type in Herb. Field Mus.).

Brongniartia Rozynskii Standl., sp. nov. — Frutex, ramulis

gracilibus dense foliatis viridescentibus subteretibus puberulis vel

pilis brevissimis subsparse strigillosis, internodiis brevibus; stipulae

caducae membranaceae viridescentes ovatae vel lanceolato-ovatae

acutae vel acuminatae sparse strigillosae; folia parva 6-8 cm. longa

breviter petiolata, rhachi gracillima puberula vel strigillosa, foliolis

breviter petiolulatis ca. 21 anguste oblongis 4-8 mm. longis plerum-

que 2-2.5 mm. latis, apice rotundatis atque apiculato-mucronatis,

basi obtusis, utrinque strigillosis, costa supra impressa, nervis

venisque utrinque prominulo-reticulatis, marginibus subrevolutis;

flores axillares singuli, pedunculis filiformibus 1.5-2 cm. longis vel

paullo ultra sparse adpresso-pilosulis; bracteolae 8 mm. longae mem-

bracaceae ovatae acutae virides ciliatae sed aliter glabrae caducae,

basi rotundatae vel subcordatae; calyx 1 cm. longus extus glaber,

tubo late campanulato basi acutiusculo, lobis tubo paullo longioribus

lanceolatis longe attenuatis ciliatis. — Mexico: Region of Jaumave,

Tamaulipas, in 1932, H. W. von Rozynski 524 (type in Herb. Field

Mus.).

Brongniartia tenuifolia Standl., sp. nov. — Frutex sparse

ramosus 1-2-metralis glaberrimus, ramis gracilibus sed rigidis,

vetustioribus sordido-brunnescentibus, novellis stramineis vel viridi-

bus subteretibus, internodiis elongatis; stipulae persistentes crasse

coriaceae oblique lateque triangulari-ovatae vel ovali-ovatae 1.5-2

cm. longae atque fere aequilatae apice rotundatae vel obtusae et

apiculatae palmatinerviae reticulato-venosae; folia magna usque 22

cm. longa et ultra breviter petiolata, rhachi gracili sed rigidiuscula,

petiolulis plerumque ca. 3 mm. longis; foliola ca. 23 anguste oblonga

vel oblanceolato-oblonga 2-3.5 cm. longa 4-6 mm. lata, apice acuta

vel subobtusa et longe spinuloso-mucronata, basi acuta vel attenuata,

glaucescenti-viridia, costa utrinque prominula, venis utrinque pro-

minulis atque arete reticulatis; flores axillares singuli, pedunculis

fructiferis 3.5-4 cm. longis erectis rigidis; calyx perfectus non visus,

tubo ut videtur late campanulato; legumen glabrum, ovulis ut vide-

tur ca. 3, ca. 4 cm. longum atque 13 mm. latum, basi angustatum

atque stipitatum, apice subacutum et breviter rostratum; semina

late ovalia subcompressa laevia viridescentia 7 mm. longa. — Mexico:

24 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. 22

Movas, Rio Yaqui, Sonora, on open hills, April 28, 1937, Howard

Scott Gentry 3046 (type in Herb. Field Mus.).

The flowers are described as yellow, but none are present on the

type specimen. The species is a well marked one, noteworthy for

the large, leathery, persistent stipules, and for the numerous narrow,

rigid, spine-tipped leaflets, which in form simulate leaves of the

genus Jacquinia.

Clitoria velutina Standl., sp. nov. — Frutex 0.6-1.5 m. altus,

ramis crassiusculis teretibus ubique dense breviter patenti-pilosis,

sat dense foliatis; folia modica longipetiolata trifoliolata, rhachi ca.

1.5 cm. longa dense patenti-pilosa; stipulae viridescentes 7-8 mm.

longae attenuatae striatae pilosae, stipellis conformibus; foliola

membranacea 4 mm. longe petiolulata lanceolato-oblonga vel ovato-

oblonga plerumque 6-7 cm. longa atque 2-3 cm. lata, lateralia

paullo minora, acuminata vel longiacuminata, basi rotundata atque

interdum subemarginata, supra viridia fere omnino glabra, venulis

arctissime reticulatis perspicuis prominulis, subtus pallidiora ubique

dense pilis longiusculis velutino-pilosa, nervis lateralibus utroque

latere ca. 9 obliquis angulo semirecto vel angustiore adscendentibus;

inflorescentiae axillares racemosae capituliformes pauciflorae foliis

duplo breviores vel interdum paullo longiores, rhachi dense pilosa,

floribus breviter pedicellatis, bracteis bracteolisque stipulis similibus

sed longioribus; calyx 13 mm. longus tubuloso-campanulatus ore

5 mm. latus dense pilis longis mollibus albidis patentibus pilosus,

lobis erectis deltoideo-ovatis 3 mm. longis acuminatis viridescentibus;

vexillum 2.5 cm. longum 12 mm. latum emarginatum extus breviter

sparseque pilosum; legumen 4 cm. longum 7 mm. latum sessile gla-

brum subobtusum et rostrato-apiculatum, basi angustatum. —

Panama: In savanna, Boquete, Prov. Chiriqui, alt. 1,500 meters,

June 26, 1938, Mrs. M.E. Davidson 784 (type in Herb. Field Mus.).

"Flower white, the center streaked with dark red." Outstanding

among the erect, shrubby species because of the abundant, soft,

velvety pubescence covering most parts of the plant.

Crotalaria sonorensis Standl., sp. nov. — Herbacea vel suffru-

ticosa metralis ramosa, ramis crassiusculis teretibus ubique dense

adpresso-pilosis, internodiis elongatis; folia modica, petiolo 3-6 cm.

longo crassiusculo dense sericeo; foliola 3 crasse membranacea

brevissime petiolulata subaequalia oblonga vel elliptico-oblonga

2.5-7 cm. longa 0.7-2.7 cm. lata obtusa vel interdum acuta, basi

vulgo cuneato-acuta vel subobtusa, supra viridia sed sat dense

STUDIES OF AMERICAN PLANTS— IX 25

sericea, subtus vix pallidiora densius sericea; racemi axillares et

terminales ut videtur remote multiflori pedunculo incluso usque 35

cm. longi, rhachi sat dense pilis brevibus adpressis vel subpatentibus

pilosa striata, bracteis lineari-filiformibus viridibus 3-4 mm. longis

persistentibus patentibus, pedicellis fructiferis ca. 5 mm. longis

superne incrassatis dense adpresso-pilosis; calyx sub fructu persis-

tens ca. 8 mm. longus extus dense sericeus, tubo late campanulato

brevi, lobis acutis vel longiacuminatis valde inaequalibus tubo plus

quam duplo longioribus; legumen in sectione longi tudinali obovato-

oblongum 1.5-2 cm. longum 8 mm. latum, apice late rotundatum

atque longirostratum, basi obtusum et breviter stipitatum, ubique

densissime pilis brevibus pallidis arete adpressis sericeum. — Mexico:

Quirocoba, Rio Fuerte, Sonora, on oak slope, October 22, 1936,

Howard Scott Gentry 2948 (type in Herb. Field Mus.).

In Senn's recent monograph of the North American species of

Crotalaria (Rhodora 41 : 317. 1939) this Sonoran plant seems to run

at once to Crotalaria mtellina Ker, var. Schippii Senn, of southern

Mexico and British Honduras. In the quality of its pubescence,

however, as well as in other respects it appears to be sufficiently

distinct specifically from all forms of the widespread C. mtellina.

Dalea Astragalopsis Standl., sp. nov. — Herba perennis ut

videtur erecta caespitosa ca. 50 cm. alta, caulibus numerosis gra-

cilibus pauciramosis inferne ferrugineis subteretibus dense adpresso-

pilosis, internodiis saepe foliis longioribus; folia 2-3.5 cm. longa

breviter petiolata, foliolis approximatis patentibus vel subreflexis;

stipulae filiformes ca. 4 mm. longae; foliola ca. 31 oblonga 2.5-6

mm. longa ca. 1.5 mm. lata, apice obtusissima vel leviter emarginata,

basi angustata, utrinque sparse glanduloso-punctata et pilis laxis

subadpressis vel fere patentibus gracillimis mollibus pilosa, margini-

bus saepe plus minusve revolutis; pedunculi axillares atque termi-

nales 4.5-9 cm. longi, floribus spicatis arete sessilibus, spicis densis-

sime multifloris subglobosis vel saepius ovalibus 7-12 mm. longis 7

mm. latis, bracteis ovato-orbicularibus 2-2.5 mm. longis abrupte

caudato-acuminatis adpressis ubique longipilosis grosse glanduloso-

punctatis; calyx extus prope basin fere glaber, superne praesertim

ad dentes pilosus, tubo pallido 2 mm. longo, dentibus inaequalibus

1-1.5 mm. longis subulatis erectis; petala laete caerulea; stamina 9,

filamentis longiexsertis. — Mexico: Sierra Canelo, Rio Mayo, Chi-

huahua, growing in scattered clumps on open pine slopes, August 26,

1936, Howard Scott Gentry 2479 (type in Herb. Field Mus.).

26 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. 22

Dalea Gentry! Stand!., sp. nov. — Herba vel suffrutex perennis(?)

ramosus, ramis gracillimis striatis sparse minute puberulis vel fere

glabris, sparse hinc inde rubido-glandulosis, internodiis saepe foliis

longioribus; folia 2-3.5 cm. longa fere sessilia, rhachi sparse minute

pilosula, foliolis approximatis, stipulis minutis subulatis; foliola ca.

23 anguste oblonga 5-9 mm. longa 2 mm. lata, apice late rotundata

atque saepe leviter emarginata, basi obtusa, supra glabra eglandu-

losa, subtus sparse obscure pilosula vel ferre omnino glabra sparse

glanduloso-punctata; pedunculi terminales et axillares usque 6 cm.

longi puberuli, floribus spicatis, spicis 1.5-3 cm. longis basi ca. 6 mm.

crassis, sursum sensim attenuatis, densissime multifloris, bracteis

lanceolatis subulato-acuminatis dense breviter pilosis erectis; calyx

late campanulatus 2-2.5 mm. longus dense breviterque pilosus,

dentibus inaequalibus viridibus tubo paullo brevioribus erectis; petala

omnia conformia alba angusta 4-5 mm. longa apice anguste rotun-

data; stamina petalis subaequilonga. — Mexico: Arroyo Hondo, Sierra

Charuco, Chihuahua, in canyon bottom among pines, September 12,

1935, Howard Scott Gentry 1809 (type in Herb. Field Mus.).

This plant is referable to the group of Dalea separated by Ryd-

berg as the genus Thornbera. There it seems to be related to Dalea

albiflora Gray, a widely distributed species of northern Mexico,

Arizona, and New Mexico, which differs in its much more abun-

dant pubescence as well as in its thicker and blunt, rather than

long-attenuate, flower spikes.

Indigofera macilenta Standl., sp. nov. — Suffrutex 60 cm. altus

sparse ut videtur ramosus, ramis gracillimis sparse foliatis sparse

vel dense albido-strigosis, internodiis elongatis; stipulae filiformes

minutae; folia parva petiolata, rhachi usque 1 cm. longa strigosa;

foliola vulgo 5, interdum 3, membranacea, lateralia breviter petio-

lulata, terminalia usque 8 mm. longe petiolulata, lanceolato-ob-

longa usque subovalia 7-15 mm. longa 3-5 mm. lata obtusa vel acuta,

interdum subemarginata, mucronulata, basi obtusa vel anguste

rotundata, prope vel paullo infra medium latissima, supra subsparse

adpresso-pilosa, subtus dense strigosa; racemi axillares pedunculo

longissimo incluso usque 15 cm. longi, laxe pauci- vel multiflori,

parte florifera ad 3 cm. longa apicem versus longe attenuata, bracteis

calyci aequilongis vel eo duplo brevioribus, pedicellis vix ultra 1

mm. longis; calyx 2-2.2 mm. longus dense strigosus fere ad basin

partitus, segmentis lineari-subulatis erectis; corolla 5-6 mm. longa,

vexillo extus sparse adpresso-piloso; ovarium sparse strigosum

lineare longirostratum. — Mexico: Guasaremos, Rio Mayo, Chi-

STUDIES OF AMERICAN PLANTS — IX 27

huahua, on oak hills, July 27, 1936, Howard Scott Gentry 2335 (type

in Herb. Field Mus.).

"Flowers orange-red, the banner faint yellow aurora at the base;

wings with an irregular touch of purple; keel white to lavender."

Inga subvestita Standl., sp. nov. — Arbor parva, ramulis brevibus

subgracilibus nodosis, novellis dense pilis longis patentibus sordido-

brunneis hispidis; folia parva 4-6-foliolata breviter petiolata, foliolis

10-13 mm. distantibus, petiolo dense hispido late alato, rhachi inter

foliola late alata 3-4 mm. lata; foliola membranacea oblongo-obovata

vel elliptico-oblonga, superiora 5-9 cm. longa et 2-4 cm. lata, inferi-

ora multo minora, omnia acuta vel acuminata, rare obtusa, basi

oblique cuneato-acuta vel subobtusa, supra vix lucida sparse pilis

aureo-brunneis patentibus hispida, longiciliata, subtus concoloria

paullo densius hispida; flores spicati, spicis axillaribus vel e nodis

defoliatis nascentibus laxe multifloris vel paucifloris 2-3.5 cm. longe

pedunculatis, ca. 3.5 cm. longis, floribus sessilibus, rhachi dense

brunneo-hispida, bracteis viridescentibus lineari-subulatis 2-3 mm.

longis persistentibus, post anthesin patentibus vel subreflexis; calyx

ca. 3 mm. longus subsparse pilis longis rufidulis patentibus hispidus,

tubo angusto subfusiformi, dentibus tubo fere duplo brevioribus

lanceolato-subulatis attenuatis erectis; corolla striata subsparse

hispida ca. 12 mm. longa, lobis suberectis ovatis acutis 2.5 mm. longis;

stamina ca. 2.5 cm. longa. — Guatemala: In virgin forest above Finca

Transvaal, Alta Verapaz, alt. 600 meters, March 15, 1939, C. L.

Wilson 315 (type in Herb. Field Mus.).

Unusual in the genus because of the small leaflets and the abun-

dant pubescence of long, spreading, golden brown hairs found on

almost every part.

Mimosa callithrix Standl., sp. nov. — Frutex bimetralis, ramis

gracilibus striato-angulatis subdense puberulis aculeis paucis remotis

recurvis 1.5-2 mm. longis armatis; stipulae filiformes 5 mm. longae

et ultra puberulae; folia modica longipetiolata, rhachi 3.5-7 cm. longa

gracillima sulcata sparse puberula aculeolis paucis minutis recurvis

armata; pinnae 3-4-jugae, rhachi 2.5-4.5 cm. longa minute puberula

inermi; foliola 6-11-juga oblonga vel anguste oblonga 6-12 mm.

longa 2-3 mm. lata obtusa et breviter apiculata, basi valde obliqua,

brevissime petiolulata, binervia, in statu juvenili sparse breviter

adpresso-pilosa, cito glabrata; flores spicati, spicis axillaribus ad

nodos geminatis ca. 7.5 cm. longis et 2 cm. longe pedunculatis, laxe

multifloris, floribus sessilibus vel subsessilibus, rhachi dense sordido-

28 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. 22

puberula, bracteis minutis; calyx late campanulatus 1.5 mm. longus

dense breviter pilosus, dentibus brevissimis; corolla dense puberula

3 mm. longa, lobis ovatis acutis vel acuminatis; stamina numerosa

lobis corollae dupla ca. 8 mm. longa. — Mexico: Sierra Charuco, Rio

Fuerte, Chihuahua, along stream banks in a canyon, alt. 1,500

meters, July 23, 1935, Howard Scott Gentry 1531 (type in Herb.

Field Mus.).

Mimosa Velloziana Mart. — A widely distributed, unpleasantly

armed, woody vine of wide distribution in tropical America, this

species is reported by Britton and Rose (N. Amer. Fl. 23: 150. 1928)

to extend only as far north as Panama. It has been collected recently

by the writer on the Pacific coast of Guatemala, and may be recorded

definitely also from Mexico: Fortune, Rio Coatzacoalcos, Veracruz,

near sea level, March, 1937, Llewelyn Williams 8875. The ver-

nacular name is reported from Veracruz as "rasca petate."

Phaseolus amabilis Standl., sp. nov. — Herba volubilis ramosa,

caulibus gracillimis glabris viridibus, internodiis plerumque valde

elongatis; stipulae 5-6 mm. longae ovatae vel oblongo-lanceo-

latae acutae multinerviae persistentes erectae; folia parva longi-

petiolata, petiolo glabro, petiolulis 2-7 mm. longis; foliola 1.5-4 cm.

longa 1-2 cm. lata, plerumque hastato-trilobata, rarius integra,

lobo terminali acuto vel acutiusculo lanceolato-oblongo, lobis basali-

bus apice rotundatis, supra sparse minute puberula, subtus fere con-

coloria minute sparse puberula vel fere glabra; pedunculi usque 5

cm. longi gracillimi glabri tortuosi 1-3-flori, pedicellis glabris usque

4 mm. longis; calyx glaber 5-6 mm. longus, tubo late campanulato

pallido, lobis inaequalibus lanceolato-attenuatis tubo longioribus,

posticis anterioribus bene longioribus; corolla purpurea glabra usque

2.5 cm. longa, petalis omnibus inferne quasi in tubum fere 1 cm.

longum cohaerentibus. — Mexico: Guasaremos, Rio Mayo, Chi-

huahua, growing on mossy, moist bank with Achimenes grandiflora,

oak-pine slope, August 26, 1936, Howard Scott Gentry 2471 (type in

Herb. Field Mus.).

This must be an unusually handsome plant for the genus, because

of its delicate habit, neatly lobed leaflets, and exceptionally large,

brightly colored flowers.

Phaseolus Gentry! Standl., sp. nov. — Herba volubilis, caule

gracili subtereti sparse pilis brunneis brevibus retrorso-piloso, inter-

nodiis plerumque foliis longioribus; stipulae multinerviae ca. 4 mm.

longae deltoideo-lanceolatae acuminatae erectae persistentes; folia

STUDIES OF AMERICAN PLANTS — IX 29

modica longipetiolata, petiolo striato-angulato sparse retrorso-

piloso, rhachi 1 cm. longa, petiolulis 2-3 mm. longis dense brunneo-

pilosis; foliola Integra subaequalia, terminal! paullo latiore ovato,

lateralibus oblique rhombicoovatis, omnia acuta usque late obtusa,

basi anguste rotundata vel late obliquo-rotundata, supra viridia

subsparse breviter adpresso-pilosa, pilis basi bulboso-dilatatis, sub-

tus fere concoloria, sparse pilosa; racemi fructiferi axillares singuli

3.5-7 cm. longe pedunculati 1-1.5 cm. tantum longi nodosi pauci-

flori, rhachi dense breviter brunneo-pilosa, pedicellis brevissimis

incrassatis; calyx ad basin fructus plus minusve persistens sed

perfectus non visus; legumen late lineare in statu adulto usque 8

cm. longum atque 7 mm. latum valde compressum, basi subacutum,

apice acutum atque breviter curvo-rostratum, glabrum, late margi-

natum, subarcuatum. — Mexico: Batopilillas, Rio Mayo, Chihuahua,

in oak and grass savanna, September 8, 1936, Howard Scott Gentry

2615 (type in Herb. Field Mus.).

"A vine on open, rocky slope with harsh grasses; flowers lavender."

Phaseolus pachycarpus Standl., sp. nov. — Herba volubilis,

caule gracillimo sparse pilis patentibus ex parte glandulosis piloso

gracillimo striato-angulato vel subtereti, internodiis brevibus vel

elongatis; stipulae persistentes viridescentes ca. 3 mm. longae

nervosae acutae vel subobtusae; folia parva longipetiolata, petiolo

gracillimo sparse piloso, rhachi 5-10 mm. longa, petiolulis ca. 2 mm.

longis dense pilosis, stipellis lineari-lanceolatis viridescentibus

petiolulis aequilongis; foliola membranacea subaequalia, terminali

paullo majore, ovata vel rhombico-ovata 2-3.5 cm. longa 1-2 cm.

lata longe sensimque attenuato-acuminata, basi subtruncata usque

cuneato-rotundata, supra viridia subsparse pilis gracillimis sub-

adpressis pilosa, venulis prominulis, subtus concoloria sparse vel

dense pilis subpatentibus pilosa, glanduloso-punticulata; racemi

fructiferi ca. 4 cm. longe pedunculati, pedunculo crassiusculo,

rhachi nodosa 2.5-3 cm. longa crassa, pedicellis incrassatis 8 mm.

longis; legumen late lineare versus apicem latissimum rectum

crassum 8-12 cm. longum ca. 12 mm. latum, apice acutum atque

1 cm. longe rostratum, basin versus sensim angustatum, sessile.—

Mexico: Guasaremos, Rio Mayo, Chihuahua, valley margin, Sep-

tember 28, 1936, Howard Scott Gentry 2888 (type in Herb. Field

Mus.).

Noteworthy for the rather large fruits, which are straight and

much thicker, i.e., less compressed, than in most species of the genus.

30 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. 22

Phaseolus pauper Standl., sp. nov. — Herba volubilis, caule

insigniter gracili tereti viridescente vix ultra 1 mm. crasso sparse

puberulo vel pilis brevissimis pilosulo, internodiis valde elongatis;

stipulae fere 3 mm. longae striatae triangulari-oblongae acutae

erectae persistentes viridescentes; folia majuscula longipetiolata

membranacea laete viridia, petiolo gracillimo 4-5 cm. longo, rhachi

ca. 1.5 cm. longa puberula, stipellis lineari-subulatis patentibus vel

reflexis 2 mm. longis; foliola subaequalia Integra, terminal! ovato

vel late ovato, lateralibus late rhombico-ovatis, 6-8 cm. longa 3-5

cm. lata sensim acuta vel longiacuminata, basi rotundata vel late

obliquo-rotundata, e basi trinervia, utrinque sparse vel dense

minuteque puberula, venulis utrinque prominulis atque laxe reticu-

latis; racemi axillares 6-8.5 cm. longe pedunculati laxe 3-5-flori,

pedunculo gracillimo patenti-pilosulo, pedicellis gracillimis 5-7

mm. longis patenti-pilosulis, bracteis bracteolisque minutis lanceo-

latis vel subulatis striatis viridescentibus; calyx valde obliquus 4

mm. longus extus sparse pilosus, labio superiore lato subobtuso,

segmentis 3 inferioribus superiore multo longioribus lineari-lanceo-

latis attenuatis; corolla ut videtur rosea ca. 1 cm. longa, vexillo

extus glabro; fructus juvenilis sessilis linearis rectus attenuato-

rostratus dense minute viscido-pilosulus ca. 9-ovulatus. — Mexico:

Arroyo margin, San Bernardo, Rio Mayo, Sonora, September 7,

1935, Howard Scott Gentry 1674 (type in Herb. Field Mus.).

Conspicuous characters are the large, broad, thin leaflets, the

very slender stems and peduncles, and the few-flowered, lax racemes.

Phaseolus robiniiflorus Standl., sp. nov. — Herba volubilis,

caule crassiusculo sparse piloso vel fere glabro tereti viridi, inter-

nodiis elongatis; folia modica membranacea, petiolo gracillimo usque

8.5 cm. longo sparse pilosulo vel fere glabro, rhachi ca. 2 cm. longa,

stipellis 2-3 mm. longis nervosis viridibus patentibus lanceolato-

linearibus vel subulatis, petiolulis 3 mm. longis; foliola integra

subaequalia ovata vel late ovata 6-6.5 cm. longa 3-4 cm. lata, longe

angusteque attenuato-acuminata, basi late rotundata vel cuneato-

rotundata, ad venas nervosque sparsissime laxe pilosula; pedunculi

crassiusculi curvi ad 14 cm. longi fere glabri, racemis usque 14 cm.

longis densissime multifloris nodosis, pedicellis glabris 5 mm. longis,

bracteis caducis striato-nervosis late ovatis acutis ca. 1 cm. longis

glabris ciliolatis; calyx pallidus membranaceus ca. 4 mm. longus

basi rotundatus, dentibus tubo brevioribus vel subaequilongis sed

inferioribus labio superiore paullo longioribus ciliatis rotundato-

ovatis; corolla ut videtur purpurea 2 cm. longa, vexillo latissimo

STUDIES OF AMERICAN PLANTS — IX 31

extus glabro hinc inde grosse glanduloso-punctato. — Mexico: Rio

Bonito, Chihuahua, August 25, 1936, Harde LeSueur 711 (type in

Herb. Field Mus.).

Known, unfortunately, only from rather fragmentary and incom-

plete material, but apparently a valid species, marked by the long

and dense, many-flowered racemes of large flowers.

Phaseolus sonorensis Standl., sp. nov. — Herba volubilis elon-

gata ramosa, caule gracili subtereti ubique dense pilis brevibus

patentibus mollibus piloso, internodiis elongatis; stipulae virides

adpressae persistentes lanceolato-oblongae 3-4 mm. longae pilosae;

folia inter minora 1-2.5 cm. longe petiolata crasse membranacea,

petiolo crassiusculo dense paten ti-piloso, rhachi ca. 1 cm. longa,

petiolulis 2-3 mm. longis densissime pilosis; foliola integra sub-

aequalia late ovata vel latissime rhombico-ovata 2.5-4 cm. longa

1.5-3.5 cm. lata acuta vel rarius obtusa, basi rotundata vel interdum

subtruncata, supra in sicco cinereo-viridia sat dense pilis brevibus

subpatentibus pilosa, costa nervisque elevatis, subtus fere con-

coloria ubique dense molliter patenti-pilosa, basi trinervia; pedun-

culi axillares singuli crassiusculi 5-10 cm. longi, racemis subremote

multifloris 3-5 cm. longis, rhachi nodosa dense pilosa, pedicellis

5-8 mm. longis longipilosis, bracteis brevibus alabastris vix aequali-

bus late ovatis nervosis acutis dense pilosis deciduis; calyx lat-

issime campanulatus ca. 3 mm. longus extus pilosus basi acutius-

culus, labio superiore ovato-rotundato, labio inferiore breviter

trilobo, lobis rotundato-ovatis apiculatis labio superiore bene brevi-

oribus; corolla ut videtur purpurea 1.5 cm. longa vel ultra, vexillo

lato extus glabro; legumen juvenile lineare sessile acutum glabrum,

marginibus paullo incrassatis. — Mexico: Sierra Chirivo, Rio Mayo,

Sonora, on canyon slope, March 8, 1935, Howard Scott Gentry 1396

(type in Herb. Field Mus.).

"A large vine, sprawling over herbs and shrubs; abundant."

The local name is given as Huirote.

Schrankia heterocarpa Standl., sp. nov. — Herba erecta(?)

metralis, caule gracili striato-angulato glabro, aculeis reflexis 1.5

mm. longis sat dense armato, internodiis solemniter elongatis; stipu-

lae filiformes 4 mm. longae; folia sparsa, petiolo gracillimo 3-5 cm.

longo dense aculeolato glabro, rhachi gracillima 1.5-2.5 cm. longa

inermi vel aculeis paucis brevibus munita; pinnae 3-4-jugae 2.5-4 cm.

longae; foliola ca. 11-juga ca. 7 mm. longa et 1.5 mm. lata glabra

sed sparse ciliata obtusissima 1-nervia, venulis obsoletis; capitula

32 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. 22

singula laxe pauciflora, pedunculo 1 cm. longo glabro aculeolis

paucis minutis vulgo armato, floribus arete sessilibus; calyx late

campanulatus denticulatus 0.5 mm. longus; corolla glabra angusta

2.2 mm. longa; stamina corolla duplo longiora; legumen immaturum

breviter stipitatum lineare valde compressum 3.5 cm. longum 3

mm. latum glabrum, apice breviter attenuato-rostratum, valvis

inermibus vel setis paucis longis conspersis, marginibus sparse

aculeolis recurvis armatis; ovula ca. 8. — Mexico: In canyon, La

Cienaguita, Rio Mayo, Chihuahua, September 10, 1936, Howard

Scott Gentry 2635 (type in Herb. Field Mus.).

"Growing among oaks, on hill slope with a rank growth of

herbs. Flowers pink." In the account of this genus (under the name

Leptoglottis) by Britton and Rose, the present plant would run in

the key to S. Roemeriana (Scheele) Blankinship, of southern Texas,

which has smaller leaflets, longer peduncles, and essentially different

fruit.

GERANIACEAE

Geranium charucanum Standl., sp. nov. — Herba ramosa 50

cm. alta vel ultra, caulibus gracilibus sparse vel dense pilis brevibus

pallidis strigosis, internodiis solemniter elongatis; stipulae lanceo-

latae ca. 6 mm. longae erectae viridescentes strigosae; folia basalia

non visa, caulina longipetiolata vel superiora sessilia vel subsessilia,

petiolo usque 8 cm. longo gracillimo strigoso; lamina ad basin tri-

secta, segmentis lateralibus interdum bipartitis, omnibus linearibus

vel lanceolato-linearibus 3-5 cm. longis longiattenuatis, basi angus-

tatis, laciniato-lobatis, interdum tantum remote inciso-dentatis,

supra sparse strigillosis, subtus ad nervos sparse strigosis; pedunculi

biflori usque 10 cm. longi gracillimi, bracteis lineari-lanceolatis 5-6

mm. longis, pedicellis gracilibus 3-5 cm. longis dense griseo-strigosis;

sepala lanceolato-ovata 10-11 mm. longa acuminata apice appendice

2-2.5 mm. longo subulato aucta, dense strigosa, pallido-marginata;

petala ut videtur laete purpurea rotundato-obovata 18 mm. longa

atque 12 mm. lata, apice late rotundata et subemarginata, glabra

sed prope basin longiciliata; filamenta inferne sparse pilosa, antheris

2 mm. longis. — Mexico: Sierra Charuco, Rio Fuerte, Chihuahua,

riparian, September 13, 1935, Howard Scott Gentry 1813 (type in

Herb. Field Mus.).

"Scattered and infrequent. Flowers purple." In general appear-

ance the plant, especially because of its large and showy flowers,

bears much resemblance to some species of the malvaceous genus

Callirrhoe.

STUDIES OF AMERICAN PLANTS — IX 33

ERYTHROXYLACEAE

Erythroxylon fiscalense Standl., sp. nov. — Frutex 1.5-3 m.

altus dense ramosus, ramis subteretibus fusco-ferrugineis rigidis

vel junioribus plus minusve tortuosis, brevioribus saepe spiniformi-

bus, lenticellis numerosis pallidis parvis subelevatis conspersis, gla-

bris, internodiis brevibus vel paullo elongatis; stipulae ovatae

acutae glabrae persistentes ca. 2 mm. longae; folia parva breviter

petiolata subcoriacea glabra, petiolo gracili tereti ca. 2 mm. longo;

lamina orbicularis vel obovato-rotundata 6-12 mm. longa et fere

aequilata apice late rotundata, basi late obtusa, supra in sicco viri-

dis, costa nervisque non elevatis, subtus paullo pallidior, costa

gracili prominente, nervis venisque obsoletis vel obscuris; flores

non visi. — Guatemala: Dry, rocky thicket, Fiscal, Dept. Guate-

mala, alt. about 1,100 meters, December 12, 1938, Paul C. Standley

59568 (type in Herb. Field Mus.).

Although the specimens are sterile, it is evident that they repre-

sent a species quite different from any other known in Central

America. The leaves are smaller than those of other Central Ameri-

can species, and are distinguished also by their orbicular or rounded-

obovate outline.

EUPHORBIACEAE

Acalypha anadenia Standl., sp. nov. — Ut videtur herbacea,

ramosa, decumbens(?), caulibus gracilibus pallide viridibus dense

incurvo-pilosulis atque sparse longipilosis, pilis tenerrimis usque 5

mm. longis patentibus, internodiis elongatis; stipulae persistentes

lineari-subulatae viridescentes ca. 2 mm. longae; folia inter minora

longipetiolata membranacea, petiolo gracillimo 1.5-3 cm. longo

dense incurvo-pilosulo; lamina lanceolato-ovata 3-8 cm. longa

1.5-3.5 cm. lata acuminata vel sensim longiacuminata, basi late

cuneato-obtusa vel cuneato-rotundata, fere ad basin crenata, supra

viridis, ad venas sparse incurvo-pilosula, aliter glabra, subtus fere

concolor puncticulato-papillosa, ubique sat dense pilis brevibus

saepe incurvis pilosula, e basi palmatim 5-nervia, costa utroque

latere nervos ca. 3 emittente; spicae terminales androgynae pedun-

culatae ca. 2.5 cm. longae atque 1.5 cm. latae, lateralibus superiori-

bus femineis subglobosis vix ultra 1 cm. longis usque 1.5 cm. longe

pedunculatis, masculis axillaribus pedunculatis gracilibus usque 4

cm. longis vix 1.5 mm. crassis; axis spicae femineae saepe supra

bracteam summam capillaceo-productus et florem femineam rudi-

mentariam gerens; bracteae femineae 1-1.5 cm. longae ultra medium

partitae, laciniis rigidis setaceo-acuminatis albido-pilosis et sparse

34 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. 22

glanduloso-ciliatis; ovarium sparse pilosum; semina pallide brun-

nescentia minutissime puncticulata fere laevia. — Mexico: Rocky

headland in front of Hotel Mirador, Acapulco, Guerrero, alt. 90-120

meters, August 21, 1935, L. H. MacDaniels 150 (type in Herb.

Field Mus.). Rocky headlands between Acapulco and Pie de la

Cuesta, Guerrero, alt. 45-60 meters, August 24, 1935, MacDaniels 214.

The relationship appears to be with A. aristata HBK., a species

of Colombia and Panama.

Acalypha Gentryi Standl., sp. nov. — Frutex 2-3-metralis,

ramulis gracilibus teretibus subferrugineis, novellis fulvido-tomentu-

losis vel puberulis atque pilosulis, internodiis elongatis; stipulae

lineari-attenuatae usque 10 mm. longae hispidulae deciduae; folia

mediocria longipetiolata membranacea, petiolo gracillimo 1.5-4.5

cm. longo dense minute adpresso-pilosulo et sparse hirtello; lamina

late ovata vel rotundato-ovata 6-10 cm. longa 4-7 cm. lata abrupte

breviterque acuminata, basi late rotundata vel saepe subcordata,

supra viridis ubique minutissime albido-puncticulata, hinc inde

praesertim ad venas costamque breviter hirtella, subtus fere con-

color sat dense molliter pilosula vel serius glabrata, e basi 5-nervia,

nervis lateralibus utroque latere ca. 7 angulo semirecto adscendenti-

bus fere rectis, toto margine fere ad basin crenato; flores ut videtur

monoeci, spicis femineis tantum visis terminalibus solitariis vel

aggregatis breviter pedunculatis pedunculo incluso usque 9 cm.

longis densifloris, rhachi dense puberula atque hispidula, bracteis

bene evolutis non visis; styli graciles breves 4-6-lacinulati purpurei.

— Mexico: El Limon, Rio Mayo, Chihuahua, canyon stream, alt.

900 meters, July 25, 1935, Howard Scott Gentry 1540 (type in Herb.

Field Mus.).

The available material, unfortunately, is in very young flower-

ing state, so that it is impossible to describe the important details

of the pistillate bracts.

Croton Cardenasii Standl., sp. nov. — Frutex 80 cm. altus,

ramis novellis crassiusculis densissime pilis adpressis stellatis ses-

silibus albidis obtectis, internodiis elongatis interdum foliis longiori-

bus; stipulae minutae vel obsoletae; folia inter minora longipetiolata

herbacea, petiolo crassiusculo 1.5-3 cm. longo dense adpresso-

stellato-piloso apice glandulis 2 magnis depressis onusto; lamina

oblongo-ovata vel lanceolato-oblonga 7-9 cm. longa 3-4.5 cm. lata

acuta vel acuminata, basi rotundata, integra, supra viridis glaber-

rima, subtus pallida ochracea densissime pilis brevibus mollibus

STUDIES OF AMERICAN PLANTS — IX 35

stellatis tomentoso-pilosa, costa crassiuscula elevata, nervis laterali-

bus utroque latere ca. 10-12 angulo semirecto adscendentibus; flores

monoeci, racemis terminalibus 4.5-9 cm. longis remote multifloris,

sessilibus vel subsessilibus, rhachi dense stellato-tomentosa, pedi-

cellis vix ultra 1 mm. longis; flores feminei pauci vel numerosi

prope basin racemi interdum cum masculis inserti, sepalis 5 elliptico-

ovatis vix 2 mm. longis extus dense stellato-tomentosis subobtusis

ut videtur vix accrescentibus, stylis semel dichotomis; flores masculi

in alabastro globosi ca. 1.5 mm. diam. extus dense stellato-tomen-

tosi; stamina ca. 10; capsula immatura parva densissime stellato-

tomentosa. — Bolivia: Robore", alt. 416 meters, in open pampa,

October, 1934, M. Cardenas 3018 (type in Herb. Field Mus.).

Croton charaguensis Standl., sp. nov. — Frutex 2-metralis,

ramis vetustioribus ferrugineis, novellis densissime pilis stellatis

paten tibus mollibus pilosis, sat dense foliatis; stipulae lineari-attenu-

atae 6-8 mm. longae glanduloso-serrulatae persistentes; folia inter

minora longipetiolata herbacea, petiolo crassiusculo 2-3 cm. longo

densissime molliter stellato-piloso; lamina ovato-oblonga vel lanceo-

lato-oblonga 6-8 cm. longa 2-3.5 cm. lata, anguste attenuato-acu-

minata, basi anguste rotundata, interdum brevissime cordata, arete

minute serrato-dentata, dentibus salientibus, utrinque dense (subtus

densius) pilis mollibus inaequiradiatis patentibus stellato-pilosa, e

basi 5-nervia, nervo medio utroque latere supra basin nervos ca. 5

emittente; flores monoeci, racemis terminalibus sessilibus sat dense

multifloris 5-8 cm. longis ca. 1.5 cm. latis, pedicellis gracilibus 3-5 mm.

longis; flores feminei pauci in quoque racemo 1-2, sepalis 5 elliptico-

ovalibus 4-5 mm. longis obtusis extus dense stellato-tomentosis;

styli bis dichotomi sparse pilosi; flores masculi numerosissimi in

alabastro globosi fere 4 mm. diam. densissime stellato-pilosi, sepalis

5 late ovatis obtusis, staminibus numerosissimis, 45 et ultra, antheris

glabris, filamentis inferne longipilosis; capsula immatura 1 cm. diam.,

densissime pilis laxis mollibus longissimis ochraceis pilosa. — Bolivia:

Rocky slopes, Quebrada de Charagua, region of the Oriente, alt. 850

meters, August, 1934, M. Cardenas 2779 (type in Herb. Field Mus.).

Noteworthy for the short, dense racemes of exceptionally large

flowers, and for the very long and soft hairs that cover densely the

young capsules.

Croton Ortegae Standl., sp. nov. — Frutex, ramis vetustioribus

fusco-ferrugineis gracilibus, novellis dense pilis minutis adpressis

stellato-pilosulis; stipulae filiformes 2-3 mm. longae integrae deci-

36 FIELD MUSEUM OF NATURAL HISTORY— BOTANY, VOL. 22

duae; folia parva breviter petiolata membranacea, petiolo gracili

5-8 mm. longo minute dense adpresse stellato-pilosulo, apice glandu-

lis 2 stipitatis parvis flavidis patentibus onusto; lamina oblongo-

lanceolata 4-6 cm. longa 0.8-1.5 cm. lata apicem acutum vel sub-

obtusum versus paullo angustata, basi obtusa vel acutiuscula,

integra, utrinque minute sparse stellato-puberula, supra viridis,

subtus paullo pallidior, penninervia; flores dioeci(?), femineis soli-

tariis vel in racemos breves paucifloros capituliformes aggregatis,

pedicellis usque 3 mm. longis, sepalis 5 valde inaequalibus foliaceis

viridibus rotundato-ovatis subacutis ca. 6 mm. longis extus sat

dense minute stellato-pilosulis, stylis semel dichotomis; capsula 4-5

mm. longa dense minute stellato-pilosula. — Mexico: Sinaloa, with-

out definite locality, in 1933, Jesus G. Ortega 7019 (type in Herb.

Field Mus.).

The form of the leaves suggests those of Sida rhombifolia. The

species is a well marked one because of the small, narrow leaves with

curious slender-stipitate glands at the apex of the petiole. On the

type material no staminate flowers are present, and it is to be assumed

that the plant is dioecious.

Croton roborensis Standl., sp. nov. — Frutex 80 cm. altus,

ramis vetustioribus fusco-ferrugineis teretibus, novellis sat dense

foliatis ubique densissime stellato-pilosis et velutinis, radiis basali-

bus pilorum brevibus, terminalibus longis mollibus; stipulae virides

lineari-lanceolatae 5-6 mm. longae subobtusae caducae; folia inter

minora petiolata herbacea, petiolo 8-15 mm. longo dense ut ramis

stellato-piloso; lamina oblongo-ovata 5-8 cm. longa 2-3.5 cm. lata

apicem obtusum versus angustata, basi anguste rotundata atque

breviter cordata, in toto margine grosse crenato-serrata, supra

viridis subdense pilis parvis subaequiradiatis conspersa, subtus

paullo pallidior dense molliter stellato-pilosa, e basi 5-nervia, nervo

medio utroque latere supra basin nervos 3-4 emittente; flores

monoeci, racemis terminalibus dense multifloris 3-5 cm. longis,

pedicellis usque 2.5 mm. longis; flores feminei 3-8, sepalis 5 viridibus

elliptico-ovatis ca. 4 mm. longis subacutis dense breviter stellato-

velutinis, petalis obsoletis, stylis semel bipartitis sparse pilosis;

flores masculi densissime aggregati numerosissimi in alabastro

globosi ca. 1.6 mm. diam. extus dense stellato-pilosuli, sepalis 5

tenuibus pallidis; stamina ca. 8 longiexsertae glabrae; capsula in

statu juvenili densissime pilis albidis pilosa. — Bolivia: "Robert of

Chiquitos (Santa Cruz)," alt. 416 meters, in dry soil, October, 1934,

M. Cardenas 2952 (type in Herb. Field Mus.).

STUDIES OF AMERICAN PLANTS — IX 37

A low shrub with small, green, narrowly ovate, coarsely crenate-

serrate leaves having abundant, soft pubescence, and with short

and very dense racemes.

Jatropha fremontioides Standl., sp. nov. — Frutex metralis,

ramis crassis flexuosis nodosisque subteretibus rubro-ferrugineis

dense cinereo-puberulis, internodiis brevibus; folia parva breviter

petiolata crasse membranacea, petiolo 2-5 mm. longo dense breviter

pilosulo; lamina ambitu late ovata usque subreniformis 1.5-3 cm.

longa atque fere aequilata undulata vel saepius breviter triloba,

lobis obtusissimis vel subrotundatis, rare acutiusculis, interdum

breviter trilobis, supra viridis molliter puberula vel glabrata, subtus

paullo pallidior subsparse molliter pilosula, basi cordata, sinu

aperto vel fere clause, trinervia vel subquinquenervia; cymae re-

ductae et capituliformes pauci- vel multiflorae breviter peduncu-

latae, bracteis numerosis imbricatis ovatis sparse pilosulis, floribus

sessilibus vel subsessilibus; sepala 3 mm. longa elliptico-oblonga

obtusa fere glabra ciliolata; petala in alabastro 4 mm. longa apice

rotundata extus glabra ciliata breviter coalita; capsula juvenilis ca.

8 mm. longa ellipsoidea breviter rostrata acute trigona. — Mexico:

Ixtepec, Oaxaca, alt. 90 meters, August 19, 1935, George L. Fisher

35498 (type in Herb. Field Mus.).

Not closely related to any other species known to the writer,

noteworthy for the small, densely pubescent, short-petiolate leaves,

whose form suggests those of the genus Fremontia.

Jatropha Ortegae Standl., sp. nov. — Kami crassiusculi nodosi

subochracei vel subgrisei, novellis minutissime puberulis; folia ad

nodos plus minusve aggregata longipetiolata membranacea vel

crasse membranacea, petiolo gracillimo 1^4.5 cm. longo sparse

minute puberulo vel fere glabro; lamina oblongo-ovata usque

elliptica 4-9 cm. longa 2-5 cm. lata obtusa usque acuminata, basi

truncata usque obtusa, integra, margine prope basin glandulis paucis

stipitatis onusto, supra viridis glabra, subtus pallida vel glaucescens

microscopice puberula vel fere omnino glabra, costa gracili promi-

nente, penninervia, nervis lateralibus utroque latere ca. 4; cymae

laxae pauciflorae vel interdum tantum 1-florae petiolo aequilongae

vel paullo longiores graciliter pedunculatae, ramis brevibus gracili-

bus minute puberulis, pedicellis interdum filiformibus usque 5 mm.

longis, bracteis parvis inconspicuis lanceolatis; sepala 2-6 mm.

longa lanceolata vel ovata obtusa usque attenuata extus puberula,

floris feminei in statu fructifero paullo accrescentia atque basin

38 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. 22

versus glandulis paucis stipitatis ciliata; corolla urceolata 6-7 mm.

longa ca. 4 mm. lata, tubo sub limbo subcontracto, extus minute

puberula vel glabrata, lobis erectis obtusissimis rotundato-ovatis

vix 2 mm. longis; capsula immatura profunde triloba 13 mm. lata

8 mm. alta. — Mexico: Sinaloa, without definite locality, in 1934,

Jesus G. Ortega 7283 (type in Herb. Field Mus.), 7413.

Marked by the long-petiolate, chiefly oblong-ovate to elliptic

leaves in which the blade bears few or numerous rather large glands

for some distance above the insertion of the petiole.

Jatropha platanifolia Standl., sp. nov. — Frutex, ramis crassis

subteretibus nodosis, cortice brunnescente, novellis dense velutino-

pilosis; folia (in statu juvenili tantum visa) longipetiolata, petiolo

dense breviter velutino-piloso; lamina basi truncata vel breviter

cordata fere ad medium triloba, interdum subquinqueloba, lobis

ovatis longiacuminatis integris vel undulatis, utrinque dense velu-

tino-pilosa, basi 5-nervia; flores cymosi, cymis reductis paucifloris

breviter pedunculatis, pedunculo ramisque brevibus dense pilosis,

bracteis parvis triangulari-lanceolatis, pedicellis brevibus crassis

pilosulis; sepala 3 mm. longa in sicco subfusca oblonga vel oblanceo-

lato-oblonga obtusa extus sparse hirtella; corolla 5-6 mm. longa

extus glabra intus pilosa, petalis oblongis apice rotundatis prope

basin breviter connatis. — Mexico: San Bernardo, Rio Mayo, Sonora,

in forest, June 26, 1935, Howard Scott Gentry 1449 (type in Herb.

Field Mus.).

In the available material the leaves are in a very early stage of

development, the blades being only 1.5-2.5 cm. long. From other

related species of northwestern Mexico J. platanifolia is well dif-

ferentiated by its deeply lobate, densely pubescent leaves.

Phyllanthus Austinii Standl., sp. nov. — Frutex gracilis 1-1.5

m. altus, interdum longior atque subscandens, ubique glaber, ramis

gracillimis teretibus viridescentibus vel ochraceis, internodiis plerum-

que elongatis; stipulae viridescentes erectae lineari-subulatae 2.5-3

mm. longae; folia mediocria petiolata membranacea tenuia, petiolo

filiformi 5-17 mm. longo; lamina ovata vel interdum lanceolato-

ovata 6-10.5 cm. longa 2-5.5 cm. lata longe angusteque acuminata,

basi rotundata vel late obtusa, supra intense olivacea, costa ner-

visque manifestis prominulis, subtus glaucescens, costa tenerrima

elevata, nervis lateralibus utroque latere 5-6 obliquis angulo latius-

culo adscendentibus tenerrimis arcuatis prope marginem arcuato-

conjunctis, venulis subprominulis arctissime reticulatis; flores dioeci

STUDIES OF AMERICAN PLANTS — IX 39

axillares solitarii vel pauci atque fasciculati; pedicelli florum masculo-

rum filiformes vix ultra 4 mm. longi, floribus parvis ca. 3 mm. latis;

pedicelli florum femineorum capillares 2-4 cm. longi flexuosi, disco

disciformi 1.5-2 mm. lato; styli 3 brevissimi recurvi; capsula obo-

voideo-globosa 8 mm. alta et ultra tricarinata; semina 3 pallide

brunnescentia ca. 4 mm. longa ubique dense irregulariter suberoso-

verrucosa. — Guatemala: Wet forest, Escoba, across the bay (west)

from Puerto Barrios, Dept. Izabal, near sea level, May 3, 1939,

Paul C. Standley 72868 (type in Herb. Field Mus.), 73012, 72968,

72951, 72981.

The species is dedicated to Mr. George B. Austin of the United

Fruit Company, Puerto Barrios, to whom the writer is indebted for

many courtesies and much practical assistance.

From Phyllanthus Bartlettii Standl., of British Honduras and

Honduras, the present plant differs conspicuously in its round-based

leaves. More closely related is P. capillipes Blake, of the same

general region of Guatemala, but in that the capsules are only 3 mm.

long, and the leaves are conspicuously narrower.

ICACINACEAE

Calatola venezuelana Pittier, Bol. Soc. Venez. Cienc. Nat. 4:

360. 1938. — The genus Calatola was proposed by the writer in 1923

(Contr. U. S. Nat. Herb. 23: 688. 1923), as consisting of two species

of trees native of southern Mexico. Another species, C. costaricensis,

was described in 1926 (Journ. Wash. Acad. Sci. 16: 416). The group

was proposed with considerable mental reservation, there being

some doubt as to whether it had been referred to the proper

family, but at present this doubt has disappeared. Study of the

wood, particularly, indicates that Calatola is definitely referable to

the Icacinaceae, where flower structure had seemed to necessitate

its reference.

What the writer has expected, however, is that some earlier

name would be found for the group, especially since the known area

of distribution has been so greatly extended in recent years. Since

the specimens are most likely to be collected in fruiting state, when

their reference to a family would be exceedingly difficult, it is proba-

ble that specimens obtained by early explorers would not be placed

or described, but would be relegated to the undetermined material

of a herbarium. No flowers have been seen by the writer from

South America. The fruit of Calatola is so distinctive that once

seen, it is not likely to be forgotten.

40 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. 22

The four species of Calatola known at present are not too well

differentiated, although it seems certain that there are at least three

species in the genus. The quantity of herbarium material must be

greatly increased before it is possible to decide satisfactorily the

specific limits of the several forms.

Calatola mollis Standl. is known only from Mexico. C. laevigata

Standl., described originally from Mexico, is now known also from

British Honduras and Guatemala, and old fruits found by the

writer on the Atlantic coast of Honduras probably are referable to

the species. Of course, it is not known that they were from trees

growing in Honduras, but the tree is to be expected there.

Calatola costaricensis Standl. is known from both Costa Rica

and Panama. A collection of the genus from Colombia (region of

Cincinnati, at 1,300-1,500 meters, Espina & Giacometto A146) I

have referred formerly to C. costaricensis, but it is perhaps referable

rather to C. venezuelana. As a matter of fact, more material is needed

before it can be determined whether there are any sure characters

for separating C. venezuelana from C. costaricensis. The fruits of

the Colombian tree are unusually small, but not smaller than might

be expected in the normal course of variation upon a single tree.

The present remarks are occasioned by the recent receipt of a

specimen of the genus that extends very greatly its known area of

dispersal: Peru: Shapajilla, Dept. Huanuco, at 630 meters, May 27,

1939, Felix Woytkowski 19; a tree about 9 meters high, with trunk

diameter of 23 cm., the bark brown, thin; wood hard, whitish brown.

The fruits are unusually large, about 6 cm. long, but in general

the specimens agree well with Venezuelan ones, and at least for the

present the Peruvian tree may be referred to C. venezuelana. The

genus now may confidently be expected to grow in Ecuador, and

perhaps also in eastern Bolivia.

RHAMNACEAE

Rhamnus pinetorum Standl., sp. nov. — Frutex metralis, ut

videtur dense ramosus, ramis subteretibus nigrescentibus vel fusco-

ferrugineis, novellis dense pilis mollibus patentibus breviusculis

pilosis, internodiis brevibus; stipulae subulatae 2-3 mm. longae

pilosulae; folia modica breviter petiolata crasse membranacea,

petiolo 3-5 mm. longo crassiusculo dense piloso; lamina anguste

oblonga vel lanceolato-oblonga 3-5.5 cm. longa 1.2-2 cm. lata

apicem obtusum versus paullo angustata, basi rotundata vel ob-

tusa, margine interdum revoluto fere integro vel remote adpresso-

STUDIES OF AMERICAN PLANTS — IX 41

serrulate, supra viridis pilis patentibus molliter sparse vel dense

pilosa, subtus paullo pallidior sat dense pilis patentibus molliter

pilosa vel serius glabrata, costa gracili prominente, nervis lateralibus

utroque latere ca. 7 angulo semirecto adscendentibus prominentibus;

flores axillares fasciculati pauci, pedicellis gracilibus 4-7 mm. longis

patule pilosis; sepala 2 mm. longa patule pilosula ovata vel oblongo-

ovata obtusa; fructus tricoccus glaber subglobosus ca. 7 mm. longus

et aequilatus apice subdepressus obscure trilobus. — Mexico: Sierra

Canelo, Rio Mayo, Chihuahua, in shaded pine-cypress canyon,

August 31, 1936, Howard Scott Gentry 2540 (type in Herb. Field

Mus.). Mojarachic, Chihuahua, August, 1938, /. Knobloch 5288.

Above Basaseachic Falls, Chihuahua, July, 1936, Harde LeSueur 111.

Related to R. Pringlei Rose, of Oaxaca and Veracruz, which is

conspicuously different in its small, short, relatively much broader

leaves.

MALVACEAE

Bastardia violacea Standl., sp. nov. — Suffrutex ramosus, ramis

gracilibus teretibus, novellis densissime minuteque stellato-tomen-

tellis, internodiis brevibus vel paullo elongatis; stipulae caducae;

folia parva petiolata membranacea, petiolo gracili 3-7 mm. longo

stellato-tomentello; lamina ovata vel lanceolato-ovata 1.5-2.5 cm.

longa 1-2 cm. lata longe attenuato-acuminata, basi breviter cordata,

lobis basalibus late rotundatis, arete adpresso-crenata, utrinque

densissime minute molliter stellato-tomentosa, basi 7-nervia; flores

plerumque singuli atque axillares, pedunculis plerumque 5-6 mm.

longis gracilibus versus apicem articulatis stellato-tomentellis; calyx

ca. 8 mm. longus dense stellato-tomentellus atque pilis longis molli-

bus albis patentibus pilosus, lobis oblongo-ovatis tubo bene longiori-

bus subulato-acuminatis trinerviis erectis; petala late cuneato-

obovata 1 cm. longa glabra violacea; carpella 4 mm. longa dense

molliter stellato-pilosa apice rotundata. — Mexico: Chinobampo,

Rio Mayo, Sonora, among rocks in mesquite arroyo, January 10,

1937, Howard Scott Gentry 2982 (type in Herb. Field Mus.).

LOASACEAE

Eucnide hypomalaca Standl., sp. nov. — Herba vel suffrutex

ramosus fragilis decumbens, ramis crassis pallide viridibus dense

pilis longis mollibus viscido-pilosis dense foliatis; folia modica longi-

petiolata membranacea, petiolo 2-4 cm. longo dense pilis patulis

viscido-piloso; lamina late ovata vel rotundato-ovata 3-7 cm. longa

2.5-5 cm. lata obtusa, basi truncata vel breviter cordata, sinuato-

42 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. 22

lobata, lobis obtusissimis grosse sinuato-dentatis, supra tactu

aspera sat dense glanduloso-pilosa vel serius glabrata, subtus ubique

dense pilis eglandulosis mollibus velutino-pilosa; pedunculi axillares

breves pilis longis patulis viscido-pilosi; sepala lineari-lanceolata

pallide viridia 2 cm. longa basin versus 4 mm. lata longe sensim

attenuata, pilis longis viscidis patentibus pilosa; petala alba ca. 4

cm. longa; stamina petalis bene longiora. — Mexico: Arroyo Mescales,

Rio Mayo, Sonora, on shaded sides of rock cliffs, February 18, 1935,

Howard Scott Gentry 1315 (type in Herb. Field Mus.).

"Perennial, spreading and short-branched. A green alleviation

on the bare rock walls. Sometimes three feet in diameter. Observed

also at Caramechi." From other species of the genus the present

plant differs substantially in the pubescence of the lower leaf surface.

In E. hypomalaca the pubescence is soft and velvety to the touch; in

other species rough and adhering to the fingers when touched.

LYTHRACEAE

Cuphea indocta Standl., sp. nov. — Herba annua(?) erecta 35

cm. alta et ultra sparse ut videtur ramosa, caule crassiusculo pallide

viridi dense pilis patulis viscidis villoso, internodiis plerumque elon-

gatis; folia modica petiolata membranacea, petiolo gracili 1-2 cm.

longo viscido-villoso; lamina lanceolata usque ovato-lanceolata 4.5-7

cm. longa 1-2.5 cm. lata acuta vel attenuato-acuminata, apice ipso

obtuso, basi acuta, supra in sicco cinereo-viridis hispidula atque

hinc inde pilis paucis longioribus conspersa, subtus fere concolor

ubique sat dense scaberula, ad costam pilis paucis longioribus

hirtella; flores ex axillis superioribus nascentes solitarii vel geminati,

pedicellis ad 3.5 mm. longis viscido-villosis, bracteolis 2 foliaceis

viridibus lineari-lanceolatis usque 8 mm. longis; calyx 8-9 mm.

longus tubulosus basi uno latere breviter rotundato-calcaratus

atque 2 mm. crassus, pallide viridis, dense pilis patulis hispidulus,

ore valde obliquo, dentibus brevissimis, intus glaber; stamina 11

inclusa glabra; petala ut videtur purpurea, majore longe unguiculato

ca. 6 mm. longo; stylus glaber 4 mm. longus; ovula 3. — Mexico:

Guasaremos, Rio Mayo, Chihuahua, growing in margins of fields,

under Guazuma ulmifolia, August 3, 1936, Howard Scott Gentry 2354

(type in Herb. Field Mus.).

UMBELLIFERAE

Eryngium calaster Standl., sp. nov. — Herba erecta perennis(?)

25 cm. alta et ultra, tantum ad nodos minute puberula, aliter glabra,

STUDIES OF AMERICAN PLANTS — IX 43

caulibus gracillimis striatis simplicibus vel superne pauciramosis,

internodiis elongatis, caule infra inflorescentiam vulgo bifoliate;

folia basalia non visa, caulina sessilia vel breviter petiolata anguste

oblanceolata 4-6 cm. longa 1-1.5 cm. lata obtusa, basin versus longe

sensim attenuata, in toto margine arete spinoso-serrata, dentibus

acuminatis patentibus, 1-nervia, venis utrinque prominulis tener-

rimis laxe reticulatis; capitula 1-4 atque 2.5-4 cm. longe pedunculata

ovoideo-globosa ca. 6 mm. longa atque aequilata densissime multi-

flora; bracteae ca. 10 lineari-lanceolatae 1.5 cm. longae et 5 mm. latae

apice tridentatae grosse spinuloso-serratae, extus in sicco caeruleo-

virides, intus fere albae, bracteolis linearibus rigidis floribus multo

longioribus. — Mexico : Memelichi, Rio Mayo, Chihuahua, in meadow

among pines, alt. 2,250 meters, September 16, 1936, Howard Scott

Gentry 2762 (type in Herb. Field Mus.).

"Common in the moist meadows. Heads blue."

APOCYNACEAE

Macrosiphonia Woodsoniana Standl., sp. nov. — Frutex sat

dense ramosus, ramis gracilibus teretibus ferrugineis rimosis, inter-

nodiis plerumque foliis brevioribus, novellis dense pilis albidis sub-

patulis tomentosis; folia parva subsessilia crassiuscula, petiolo vix

1 mm. longo; lamina oblonga vel ovato-oblonga 1-1.5 cm. longa 4-8

mm. lata acuta vel obtusa, basi rotundata, supra cinereo-viridis

dense molliter pilosula, subtus paullo pallidior dense pilis longius-

culis patulis vix intertextis pilosa; flores singuli axillares, pedunculo

nullo, pedicello 7-11 mm. longo superne paullo incrassato piloso et

puberulo; sepala anguste triangulari-lanceolata 4-5 mm. longa e

basi ad apicem sensim attenuata subpurpurea dense pilosula; corolla

alba extus densiuscule pilis albis longiusculis pilosa, tubo gracili

3.5 cm. longo 2 mm. crasso, fauce 2 cm. longo superne 7 mm. lato,

lobis rotundatis 2 cm. longis et aequilatis apice late rotundatis;

folliculi graciles ca. 6.5 cm. longi, valvulis 7 mm. latis. — Mexico:

Guasaremos, Rio Mayo, Chihuahua, arid oak slopes, July 30, 1936,

Howard Scott Gentry 2342 (type in Herb. Field Mus.).

Local name San Juanito. "A low, woody bush. Petals white

with a pink margin below, wilting under the sun." Although most

of the species of Macrosiphonia are none too sharply differentiated,

the present plant appears to have characters sufficient for specific

segregation. It is related to M. macrosiphon (Torr.) Heller, which

also occurs in Chihuahua, but that has usually much larger, more

conspicuously petiolate leaves, and calyx lobes 1-2 cm. long. M.

44 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. 22

hesperia I. M. Johnston, of Lower California, resembles M. Wood-

soniana in its definitely shrubby habit, but differs in its large, ovate-

orbicular leaves, and somewhat larger calyx lobes.

The species is named for Dr. Robert E. Woodson, Jr., monogra-

pher of the North American Apocynaceae, to whom the writer is

indebted for many favors.

Zschokkea Standleyi Woodson, sp. nov. — Arbor ca. 5-7 m.

alta; ramulis graciliusculis glabris. Folia opposita breviter petio-

lata oblongo-elliptica apice acute acuminata basi late obtusa rotund-

atave 10-12 cm. longa 3-4 cm. lata subcoriacea glabra; petiolo

0.6-0.8 cm. longo glabro. Inflorescentia lateralis opposita 3-8-

flora; pedunculo 1.0-1.3 cm. longo glabro. Flores gilvi pro genere

magni; pedicello 0.3 cm. longo glabro; bracteis late ovatis ca. 0.1

cm. longis; calycis laciniis ovato-subreniformibus rotundatis 0.2-0.25

cm. longis subfoliaceis margine ciliolatis; corollae salverformis tubo

ca. 2.5 cm. longo paululo arcuato basi ca. 0.2 cm. diam. medio

angustato tertia parte superiore staminigero ibique aliquid inflate

extus glabro intus minute pilosulo, lobis oblique ovato-lanceolatis

acuminatis ca. 0.8 cm. longis patulis extus glabris intus basi papil-

latis; antheris anguste oblongis 0.6 cm. longis; ovario ovato-fusi-

formi cum stylo 0.6 cm. longo glabro vel minutissime papillate,

stigmate 2-fido anguste oblongoideo ca. 0.15 cm. longo apice apicu-

lato dense puberulo-papillato. Fructus ignotus. — Guatemala: Entre

Rios, Dept. Izabal, alt. ca. 18 meters, common in pasture, April 30,

1939, P. C. Standley 72587 (Herb. Missouri Bot. Garden, type;

Herb. Field Mus., duplicate).

This plant is of considerable interest since it is the most northern

known representative of the South American genus Zschokkea, most

frequent in the upper Amazon Valley. Like Z. panamensis Woods., it

differs from the South American congeners by its relatively long,

spreading corolla lobes, but the corolla, and particularly the calyx,

are so large that at first sight the genus was not recalled. In all

other known species of the genus the calyx is very inconspicuous,

seldom exceeding 0.1 cm. in length; and this character apparently

is quite constant.

ASCLEPIADACEAE

Asclepias amsonioides Standl., sp. nov. — Herba perennis 25

cm. alta, caule inferne tantum ramoso sparse bifarie puberulo vel

fere glabro bisulcato subtereti, internodiis infimis abbreviatis,

superioribus elongatis et foliis fere aequilongis; folia opposita brevis-

STUDIES OF AMERICAN PLANTS — IX 45

sime petiolata crassa, petiolo incrassato vix ad 3 mm. longo, in

foliis superioribus nullo; lamina linearis 3.5-6 cm. longa 2.5-4 mm.

lata e basi ad apicem sensim angustata, basi acuta vel obtusa et

interdum subdilatata, supra glabra vel sparse minute puberula,

subtus fere glabra vel ad costam pallidam prominentem sparse

pilosula, nervis obscuris vel obsoletis; umbellae axillares singulae

paucae 3-6 cm. longe pedunculatae, 7-8-florae, bracteis inconspicuis

subulatis 3-5 mm. longis, pedicellis 12-17 mm. longis filiformibus

sparse minute puberulis; calyx ca. 3 mm. longus glaber vel glabratus,

segmentis lanceolato-oblongis acutis erectis; corolla rotata plus

minusve reflexa glabra, lobis ut videtur pallide viridibus ovatis vel

oblongo-ovatis 5-6 mm. longis obtusis pallido-marginatis; gyno-

stegium subsessile, coronae cucullis late oblongis 3 mm. longis apice

tridentatis, dentibus triangularibus acutiusculis, corniculis sub-

exsertis simplicibus attenuatis. — Mexico: La Cima, Chihuahua,

June 29, 1936, HardeLeSueur 848 (type in Herb. Field Mus.).

Asclepias Gentry! Standl., sp. nov. — Herba gracilis perennis

ut videtur simplex 13-26 cm. alta, caule viridi bifarie incurvo-

pilosulo, internodiis plerumque foliis paullo brevioribus, interdum

duplo brevioribus; folia numerosa opposita anguste linearia sessilia

vel in petiolum brevem angustata 3.5-6 cm. longa vix ultra 1.5 mm.

lata, apice acutiuscula, sparse puberula vel pilosiuscula, uninervia,

marginibus vulgo revolutis; umbellae axillares 2-3 vulgo 6-10-

florae, pedunculis 1.5-2.5 cm. longis, bracteis subulatis brevibus,

pedicellis filiformibus 5-14 mm. longis dense puberulis; calycis

segmenta valde inaequalia usque 2.5 mm. longa lanceolato-linearia

viridia adpressa incurvo-puberula; corolla glabra reflexa ut videtur

rubro-purpurea, lobis oblongis obtusis ca. 4.5 mm. longis; gynostegium

1.5 mm. longe stipitatum, coronae cucullis luteis latis margine

inflexis obtusis, corniculis simplicibus valde curvis. — Mexico: Gua-

saremos, Rio Mayo, Chihuahua, sunny oak slopes, July 24, 1936,

Howard Scott Gentry 2330 (type in Herb. Field Mus.).

"Scattered infrequently with short grass on almost barren

slopes." A low, slender plant, with long, linear leaves, and compact,

small umbels of apparently purple-red and yellow or orange flowers.

Asclepias suffrutex Standl., sp. nov. — Perennis ramosa prope

basin lignosa, caulibus ut videtur numerosis gracillimis teretibus

glaucescentibus vix ultra 1 mm. crassis glabris, internodiis plerum-

que foliis multo longioribus; folia pauca remota opposita filiformia

vel anguste linearia patula vel recurva 2.5-5 cm. longa minus quam

46 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. 22

1 mm. lata glabra pallida; umbellae ca. 3 ad apicem rami aggre-

gatae breviter pedunculatae pauciflorae, pedicellis gracillimis glabris

8-14 mm. longis; sepala ca. 2 mm. longa anguste triangulari-lanceo-

lata erecta anguste attenuata glabra; corolla reflexa glabra ut

videtur pallide viridis vel fere alba, lobis 3.5 mm. longis obtusis;

gynostegium breviter stipitatum, coronae cucullis oblongis margine

inflexis apice rotundatis integris, corniculis simplicibus valde recurvis

subulatis; folliculi immaturi lineari-lanceolati 3.5 cm. longi 3.5 mm.

lati glabri, apicem versus longe sensimque attenuati. — Mexico:

Huisiego, Rio Mayo, Chihuahua, growing out of crevices in a

boulder on oak slope, August 15, 1936, Howard Scott Gentry 2388

(type in Herb. Field Mus.).

"Perennial from a woody base. Margin of flower white." An

extremely slender and rather delicate plant, pale green, with almost

filiform, elongate leaves.

CONVOLVULACEAE

Ipomoea Gentry! Standl., sp. nov. — Herba ut videtur procum-

bens, caulibus brevibus striato-angulatis glabris, internodiis plerum-

que brevibus; folia parva longipetiolata membranacea, petiolo

gracillimo 1.5-2.5 cm. longo glabro; lamina ambitu rotundato-

ovata 1.5-2.5 cm. longa et aequilata profunde saepe fere ad basin

5-lobata, lobis exterioribus interdum quoque lobatis, lobis anguste

lanceolato-oblongis usque fere linearibus longiattenuatis integris

vel undulatis, basi profunde cordata, sinu late rotundato, supra

sparse subadpresse hirtella, subtus glabra; pedunculi axillares

singuli 8-13 mm. longi sursum paullo incrassati glabri; sepala

oblonga adpressa 1.5 cm. longa obtusa vel acutata atque 1 mm. longe

mucronata glabra puncticulata coriaceo-membranacea; corolla 8.5

cm. longa ut videtur pallide purpurea, tubo inferne gracillimo et 2

mm. crasso, parte angusta ca. 3 cm. longa, fauce subabrupte dilatato,

limbo ca. 6 cm. lato obscure repando-lobato, lobis apice truncatis

mucronatis; stamina 5 cm. longa. — Mexico: Sierra Canelo, Rio

Mayo, Chihuahua, in open meadow, pine-oak country, August 30,

1936, Howard Scott Gentry 2497 (type in Herb. Field Mus.).

"A small ground vine. Corolla opal."

Ipomoea maltratana Standl., sp. nov. — Herba volubilis,

caulibus gracilibus teretibus striatis sparse minuteque hispidulis

vel fere glabris, internodiis brevibus foliis subaequalibus; folia parva

petiolata membranacea, petiolo 6-20 mm. longo gracili sparse hir-

tello vel glabrato; lamina sagittata vel late sagittata 1.5-3 cm. longa

STUDIES OF AMERICAN PLANTS — IX 47

basi 1-1.5 cm. lata, lobo terminali triangulari-oblongo acuto vel

acuminato apiculato, integro vel undulato, lobis basalibus latis

oblongis vel rotundatis grosse undulato-paucidentatis, concolor,

utrinque sparse hispidula, basi profunde cordata, sinu lato vel

latissimo; pedunculi axillares singuli 1-flori cum pedicello 1-2 cm.

longi sparse hispiduli, pedicello glabro obscure verruculoso; sepala

subcoriacea inaequalia, interiora ovato-oblonga 5-6 mm. longa

obtusa brevissime mucronata glabra adpressa, exteriora fere duplo

breviora atque paullo latiora verruculosa; corolla ut videtur pur-

purea ca. 4.5 cm. longa. — Mexico: Zacatal, Maltrata, Veracruz,

May, 1937, E. Matuda S-106 (type in Herb. Field Mus.).

LABIATAE

Hedeoma floribunda Standl., sp. nov. — Herba perennis

erecta 30 cm. alta e basi dense ramosa, caulibus gracilibus incurvo-

puberulis, internodiis foliis subaequalibus; folia modica breviter

petiolata firme membranacea, petiolo vix ultra 2 mm. longo, lamina

anguste oblonga vel oblanceolato-oblonga 7-18 mm. longa 2-5 mm.

lata obtusa, basi angustato-acuta, utrinque dense punctata et

sparse minute puberula, margine integro vel sparse apicem folii

versus serrulato-dentato; flores numerosissimi apice caulis fere

spicatim aggregati, inflorescentia densa plus minusve foliata, floribus

dense fasciculatis, pedicellis gracillimis vix ultra 2 mm. longis; calyx

tubulosus 3 mm. longus incurvo-puberulus, dentibus brevibus sub-

patulis triangularibus acuminatis, fauce dense barbato; corolla 6-7

mm. longa ut videtur purpurascens extus minute pilosula, labiis

valde inaequalibus. — Mexico: Cerro Quicorichi, Rio Mayo, Sonora,

in pine woods, October 6, 1935, Howard Scott Gentry 1938 (type in

Herb. Field Mus.).

Vernacular name Ore'gano. The plant is employed locally for

seasoning meat stews.

SOLANACEAE

Brunfelsia nyctaginoides Standl., sp. nov. — Frutex(?), ramu-

lis gracilibus teretibus, vetustioribus ochraceis, novellis dense

breviter villosulis, internodiis brevibus; folia inter minora petiolata

membranacea, petiolo gracili 8-15 mm. longo sparse villosulo vel

glabrato; lamina ovata vel ovato-elliptica 4-8 cm. longa 2-4 cm.

lata acuta, basi acuta, subito contracta et longe angusteque decur-

rens, supra viridis, ad costam breviter villosula, aliter glabra, subtus

fere concolor, ad costam nervosque sparsissime villosa, aliter glabra,

costa gracili prominente, nervis lateralibus utroque latere 3-5

48 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. 22

arcuatis angulo semirecto adscendentibus tenerrimis prominulis,

venulis obscuris; inflorescentia terminalis cymoso-corymbosa pauci-

flora vix foliis longior e basi ramosa, pedicellis usque 13 mm. longis

dense breviter villosulis; calyx campanulatus ca. 1 cm. longus viridis

fere glaber ad medium vel profundius lobatus, lobis ovato-oblongis

acutis vel acuminatis ciliolatis; corolla extus ad nervos sparse villo-

sula vel fere glabra, tubo gracili 3.5 cm. longo medio 2 mm. lato,

fauce 5 mm. lato, e basi ad faucem sensim dilatato, limbo breviter

lobato, lobis late rotundatis villosulo-ciliatis. — -Mexico: Mount

Tacana, Chiapas, alt. 1,000-2,000 meters, August, 1938, E. Matuda

2411 (type in Herb. Univ. Michigan).

The material is in flower and young fruit. I am not altogether

certain as to its generic disposition, but it seems to belong in Brun-

felsia, although in foliage it is not exactly like any other species that

I have examined. The genus has not been recorded before for

Mexico.

LENTIBULARIACEAE

Utricularia Gentry! Standl., sp. nov. — Herba pusilla, caule

2.5-6 cm. alto gracillimo glabro recto vel subflexuoso 1-3-floro vulgo

bracteis 1-2 minutis vix 1 mm. longis lanceolatis acuminatis sessili-

bus onusto; folia omnia basalia atque subrosulata anguste cuneato-

spathulata 5-10 mm. longa apice subtruncata vel late rotundata,

basin versus longe sensimque attenuata, in sicco tenerrima et fere

hyalina, nervosa; flores pallide caerulei, pedicellis vix ultra 1 mm.

longis, bracteolis pedicello brevioribus lanceolatis suberectis acutis

vel acuminatis; calycis segmenta 2.5-3 mm. longa paullo inaequalia

ovato-rotundata apice rotundata vel obtusissima; corolla glabra

ca. 1 cm. longa vel ultra, labio postico 5 mm. longo, antico latissimo

apice rotundato undulato, calcare 5-6 mm. longo angusto incurvo.

—Mexico: Sierra Chirivo, Rio Mayo, Sonora, March 8, 1935,

Howard Scott Gentry 1407 (type in Herb. Field Mus.).

"On flat rock in seeping water. The delicate basal leaves were

imbedded in a fine moss, and it was necessary to use tweezers to

get them. Corolla pale blue."

RUBIACEAE

Capirona erythroxylon Standl., sp. nov. — Ramuli crassi dense

pilis brevibus ochraceis hirsuti, internodiis brevibus; stipulae non

visae; folia magna breviter petiolata membranacea, petiolo crasso

ad 2 cm. longo dense breviter hirsute; lamina cuneato-obovata vel

late elliptico-obovata 15-27 cm. longa 8-14 cm. lata apice subro-

STUDIES OF AMERICAN PLANTS — IX 49

tundata et abrupte brevissime apiculato-acutata, e tertio superiore

sensim ad basin cuneato-attenuata vel interdum subabrupte con-

tracta et attenuata, supra sparse breviter hirsutula vel fere glabra,

venulis arctissime reticulatis prominulis, subtus ubique dense

molliter breviter pilosa, costa gracili elevata, nervis lateralibus

utroque latere circiter 16 prominentibus angulo lato fere recto

divergentibus, venulis prominentibus arete reticulatis; inflorescentia

terminals cymoso-paniculata sessilis circiter 9-11 cm. longa et

aequilata vel major, e basi trichotoma, ramis oppositis vel verticil-

latis late adscendentibus sparse pilosis vel glabratis, bracteis late

ovatis vel ovalibus ad 6 mm. longis membranaceis deciduis, cymis

paucifloris, pedicellis crassiusculis vulgo 3-8 mm. longis; hypanthium

turbinatum 3 mm. longum sparse vel dense hirsutum vel glabratum,

calyce breviter lobato, lobis late ovatis vel ovalibus apice rotundatis

ca. 3 mm. longis, lobo uno interdum in laminam foliaceam 4.5 cm.

longe petiolatam late ovatam glabram apice obtusam vel rotundatam

palmatinerviam 6.5 cm. longam producto; corolla 2 cm. longa extus

glabra, tubo crasso intus ad insertionem staminum villoso, lobis 5

ovato-oblongis acutis intus glabris tubo duplo brevioribus; stamina

paullo infra faucem inserta, filamentis complanatis, antheris lineari-

oblongis 6 mm. longis. — Peru: Without locality, "ano de 1800,"

Ruiz & Pavdn (type in herb. Madrid).

The vernacular name is reported as Palo Colorado. This may be

the plant to which reference is made by Schumann (in Mart. Fl.

Bras. 6, pt. 6: 196. 1888): "Spruce found near Yurimaguas, along

the Rio Huallaga, another species, which I have not seen, with sub-

pilose leaves attenuate at base and apex, and with paler bark."

However, the characterization of the leaves does not agree well with

the species here described. The present species is altogether dif-

ferent from the other one known from Peru, C. decorticans Spruce,

in its pubescence and leaf shape. It is possible then that when

more satisfactory material has been obtained, it will be necessary

to make some other generic disposition of Capirona erythroxylon.

Cephaelis phaneroneura Standl., sp. nov. — Frutex 1.5 m.

altus ramosus, ramis gracilibus subteretibus ochraceis, novellis pilis

sordidis patentibus vel subadpressis sat dense pilosis, internodiis

elongatis; stipulae persistentes in vaginam brevem annuliformem

connatae, vagina setis 2 erectis pallidis 4 mm. longis et ultra utroque

latere aucta; folia inter minora breviter petiolata membranacea,

petiolo crassiusculo 5-8 mm. longo adpresso-piloso; lamina lanceo-

lato-elliptica vel anguste oblongo-elliptica 9-14 cm. longa 3.5-5.5

50 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. 22

cm. lata breviter vel longe acuminata, basin versus attenuata vel

acuminata, supra in sicco fusca vix lucida ad costam adpresso-

pilosa, aliter glabra, costa prominente, nervis manifestis sed non

elevatis, subtus fere concolor, ad costam nervosque adpresso-pilosa,

aliter glabra vel glabriuscula, costa gracili valde elevata, nervis

lateralibus utroque latere ca. 6 elevatis angulo semirecto vel angus-

tiore adscendentibus valde obliquis arcuatis, venis prominentibus

transversis atque subparallelis remotis; inflorescentia capituliformis

terminalis arete sessilis 2.5 cm. longa 3.5 cm. lata densissime multi-

flora, bracteis liberis oblongo-ovatis vel oblongo-lanceolatis 6-8 mm.

latis acutis extus dense breviter pilosis, intimis multo brevioribus

atque angustioribus; flores in alabastro tan turn visi et non bene

evoluti. — Peru: On rising ground, Gamitanacocha, Rio Mazan,

Dept. Loreto, alt. 100-125 meters, January 25, 1935, Jose M.

Schunke 116 (type in Herb. Field Mus.).

A well marked species, not easily associable with any other

Peruvian one. Although the flower heads are fully expanded, so

far as the bracts are concerned, the flowers still are so young that it

has been impossible to establish their character with any certainty.

Eizia Standl., gen. nov. — Frutices fere glabri, ramulis sub-

teretibus ad nodos paullo dilatatis; folia opposita petiolata mem-

branacea; stipulae interpetiolares brevissimae fere ad lineam inter-

petiolarem reductae; inflorescentia terminalis cymosa laxe pauciflora

pedunculata, floribus pedicellatis magnis, bracteis bracteolisque

valde reductis fere nullis inconspicuis; hypanthium clavatum basin

versus sensim attenuatum costato-angulatum; calyx profunde 4-

lobus viridis, lobis latis ad apicem fructus persistentibus; corolla

hypocrateriformis fulva, tubo gracili longissimo, versus apicem

paullo sensim dilatato, intus glabro, lobis 4 leviter imbricatis (vel

convolutis?) patentibus oblongis venosis intus glabris; stamina 4 ad

apicem tubi inserta, filamentis brevissimis, antheris dorsifixis erectis

subexsertis obtusis; ovarium 2-loculare; stylus inclusus longissimus

gracillimus puberulus apice brevissime bifidus, ovulis numerosis;

capsula obovoidea costata, apice alte supra calycem persistentem

protrusa, subcoriacea, apice septicide bivalvata, valvis apice bipar-

titis; semina numerosa angulata tuberculato-rugosa.

Type species, Eizia mexicana Standl.

Eizia mexicana Standl., sp. nov. — "Frutex herbaceus," ramulis

pallide brunnescentibus in sicco substriatis, internodiis elongatis;

linea stipularis vix 0.5 mm. alta medio breviter apiculata; petiolus

STUDIES OF AMERICAN PLANTS — IX 51

gracilis glaber 1-2.3 cm. longus; lamina ovata vel oblongo-ovata

7.5-10.5 cm. longa 2.5-5.5 cm. lata anguste longiacuminata, basi

saepe obliqua obtusa vel acuta, supra in sicco subfusca glabra

puncticulata, costa subimpressa, nervis manifestis sed non elevatis,

subtus fere concolor in axillis nervorum barbata, aliter glabra, costa

gracillima elevata, nervis lateralibus utroque latere ca. 6 arcuatis

angulo latiusculo adscendentibus, venulis obscuris; inflorescentia

usque 1.5 cm. longe pedunculata, interdum sessilis, pauciflora laxa

usque 7 cm. longa atque aequilata, ramis pedicellisque glabris vel

glabratis, pedicellis rigidis 1.5-2.5 cm. longis erectis; hypanthium

glabrum 4-5 mm. longum, calyce 2 mm. longo viridi, lobis late

triangularibus acutiusculis; corolla extus saltern in parte superiore

puberula, tubo 5 cm. longo infra orem 4 mm. lato, lobis ca. 8 mm.

longis; antherae ca. 6 mm. longae 1 mm. latae; capsula ca. 12 mm.

longa atque 8 mm. lata basi obtusa vel subacuta ca. 3 mm. supra

calycem protrusa; semina irregulariter angulata 0.6-0.8 mm. diam.

fusco-brunnea. — Mexico: Mount Tacana, Chiapas, alt. 1,000-2,000

meters, August, 1938, E. Matuda 2402 (type in Herb. Univ. Michigan;

fragment and photo, in Herb. Field Mus.).

This plant is a somewhat puzzling one, as so often is the case

with unusual Rubiaceae. In general appearance it does not suggest

definitely any other group of North or South America. The cap-

sules do bear some similarity to those of Manettia, but the large

corolla, with long, slender tube and spreading limb recalls to one

the flowers of such a remote genus as Mirabilis. The genus is to be

placed, apparently, in the tribe Rondeletieae, but there no close

association with other genera is apparent. Probably it is related to

Lindenia and Stylosiphonia, and more closely to the former. Lindenia

differs, however, in having 5-parted flowers, narrow, elongate calyx

lobes, and smooth seeds, nor is it similar in vegetative characters.

The genus is dedicated to its discoverer, Mr. Eizi Matuda, whose

extensive explorations in southern Mexico have added many species

to the known flora of that region, especially in the little known

mountains of the state of Chiapas.

Hillia Matudai Standl., sp. nov. — Arbor 10-metralis, trunco

15 cm. diam., omnino glabra, ramulis crassis plus minusve compres-

sis fuscis, internodiis brevibus; folia majuscula petiolata in sicco

subcoriacea, petiolo crasso 1.5-2.5 cm. longo; lamina late elliptica

vel ovali-elliptica 6.5-10.5 cm. longa 4-8 cm. lata obtusa, basi

breviter cuneato-angustata, supra in sicco fusca, costa subimpressa,

nervis prominulis, subtus paullo pallidior, costa prominente, nervis

52 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. 22

lateralibus utroque latere ca. 8 tenerrimis vix prominulis angulo

angusto adscendentibus fere rectis, venulis obsoletis; inflorescentia

terminalis cymoso-corymbosa saepissime triflora sessilis vel breviter

pedunculata, pedicellis brevibus crassis; hypanthium clavatum 7-8

mm. longum basin versus sensim angustatum; calyx usque 9 mm.

longus, segmentis erectis rigidis lanceolatis subulato-acuminatis

inaequalibus; corolla alba coriacea, tubo gracili ca. 9 cm. longo

medio 4 mm. lato, apice ca. 6 mm. lato, lobis 5 patentibus oblongis

apice obtusis vel rotundatis 3-3.5 cm. longis; antherae semiexsertae;

stylus breviter exsertus. — Mexico: Mount Tacana, Chiapas, alt.

2,000-4,040 meters, August, 1938, E. Matuda 2327 (type in Herb.

Field Mus.; duplicate in Herb. Univ. Michigan).

Among all species of Hillia found in Mexico or northern Central

America this is easy of recognition because of the unusually large

flowers and the large, broad leaves.

Hoffmannia areolata Standl., sp. nov. — Frutex 0.6-1.8 m.

altus simplex(?), caule subtereti vel obtuse tetragono villoso vel

glabrato, internodiis elongatis; folia mediocria longipetiolata herba-

cea, petiolo 2.5-5 cm. longo superne marginato villoso vel glabrato;

lamina oblongo-elliptica vel ovato-oblonga ca. 15 cm. longa atque

5.5 cm. lata longe anguste acuminata, basin versus longe sensim

attenuata atque decurrens, supra in sicco viridis, ad costam villosa,

intra areolas venarum pilis aggregatis paucis albidis brevibus crassis

villosa, subtus pallidior, ad costam elevatam villosa, ad nervos

venasque pilis brevibus pallidis villosula, nervis lateralibus utroque

latere ca. 17 teneribus prominentibus arcuatis angulo ca. recto

divergentibus, venulis elevatis laxe reticulatis; flores numerosi dense

aggregato-cymosi, inflorescentiis multifloris sessilibus vel brevissime

pedunculatis; fructus dense pilis plurilocularibus longis villosus.—

Panama: In rain forest, Bajo Chorro, Boquete District, Provincia

de Chiriqui, 1,800 meters, January, 1938, Mrs. M. E. Davidson 40

(type in Herb. Field Mus.).

The flowers are described as greenish, although none are present

on the single specimen seen, and the fruits as scarlet. The available

material, unfortunately, is not in good condition, as the result of

too abundant moisture during drying, and it is impossible to deter-

mine satisfactorily the characters of the inflorescence. The curious

pubescence of the leaves is unlike that of any other species, and this

character alone is sufficient to establish the species as distinct. The

pubescence of the upper leaf surface consists of a small, isolated

group of short, stubby, pale hairs in each areole.

STUDIES OF AMERICAN PLANTS — IX 53

Hoffmannia cryptoneura Standl., sp. nov. — Frutex ramosus,

ramis gracilibus glabris in sicco fuscis, internodiis elongatis; stipulae

parvae caducae; folia inter minora breviter petiolata membranacea,

petiolo 6-17 mm. longo glabro; lamina oblanceolata vel oblongo-

oblanceolata 7-11.5 cm. longa 2-2.8 cm. lata anguste acuminata vel

interdum apicem subobtusum versus angustata, basin versus longe

sensim attenuata, glabra, supra in sicco fuscescens, nervis obsoletis,

costa non elevata, subtus pallidior, brunnescens, costa crassiuscula

perspicua sed vix elevata, nervis lateralibus utroque latere ca. 8

sed vix obviis, venis obsoletis; flores pauci vel numerosi in axillis

dense cymoso-aggregati, inflorescentia sessili petiolum vix aequante,

floribus sessilibus vel usque 5 mm. longe pedicellatis tetrameris;

hypanthium turbinatum glabrum 1 mm. longum, calyce aequilongo,

dentibus brevibus triangularibus acutis; corolla extus glabra, tubo

gracili 5-6 mm. longo superne paullo dilatato, lobis aequilongis

patentibus oblongo-linearibus obtusis; stamina lobis corollae fere

aequilonga, filamentis exsertis, antheris erectis linearibus 3.5 mm.

longis. — Mexico: Mt. Ovando, Chiapas, April, 1936, E. Matuda 944

(type in Herb. Field Mus.); also No. 955. Duplicates of both

collections in Herb. Univ. Michigan.

The nearest relative is perhaps H. psychotriaefolia (Benth.)

Griseb., of Central America. In that the leaves are conspicuously

different because of their prominent lateral nerves. In H. crypto-

neura the nerves are scarcely perceptible.

Hoffmannia Davidsoniae Standl., sp. nov. — Frutex 0.6-1.8 m.

altus ut videtur simplex, caule crassiusculo tereti glabro, internodiis

elongatis; folia majuscula longe petiolata herbacea, petiolo gracili

2-5 cm. longo glabro; lamina ovalis vel ovali-elliptica 12-17 cm.

longa 6.5-9 cm. lata, apice rotundata vel obtusissima atque breviter

abrupte apiculato-acuminata, acumine triangulari vel anguste

triangulari vix 1 cm. longo, basi subito acuta et breviter decurrens,

glabra, supra in sicco fusca, costa nervisque vix elevatis, subtus

fere concolor, costa gracili elevata, nervis lateralibus utroque latere

ca. 15 teneris valde curvis angulo recto divergentibus prope mar-

ginem arcuato-conjunctis, venulis inconspicuis sed arete reticulatis;

inflorescentia axillaris sed e nodo defoliate nascens laxe cymoso-

corymbosa longipedunculata multiflora ca. 4 cm. longa atque 9 cm.

lata, basi trichotoma, pedunculo 4-6.5 cm. longo recto glabro,

floribus tetrameris in alabastris tantum visis glabris, pedicellis

fructiferis plerumque 5-7 mm. longis; fructus oblongo-ovalis 4-5

mm. longus 2.5 mm. latus obscure costatus, sepalis persisten'tibus

54 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. 22

late triangularibus brevissimis. — Panama: In rain forest, Bajo

Chorro, Boquete District, Provincia de Chiriqui, 1,800 meters,

January, 1938, Mrs. M.E. Davidson 216 (type in Herb. Field Mus.).

"Flowers pale pink; fruit scarlet." The species is noteworthy

for the broad inflorescence, larger than in most other species of

Hoffmannia, and borne upon an unusually long and stiff peduncle.

Morinda asperula Standl., sp. nov. — Frutex 3-metralis, ramulis

crassiusculis in sicco fere nigris obtusangulis dense minuteque

scaberulis, internodiis elongatis; stipulae persistentes late ovali-

ovatae 10-14 mm. longae apice late obtusae vel rotundatae minute

scaberulae; folia majuscula breviter petiolata firme membranacea in

sicco fusca, petiolo crassiusculo 5-10 mm. longo scaberulo; lamina

oblongo-elliptica vel subelliptica 11-18 cm. longa 4-7.5 cm. lata

acuminata vel longiacuminata, basi acuta, supra glabra vel in statu

juvenili sparse minute scaberula, cito glabrata, subtus ubique

minute denseque scaberula, tactu asperula, in axillis nervorum

dense barbata, costa prominente gracili, nervis lateralibus utroque

latere ca. 7 angulo semirecto vel paullo latiore adscendentibus

obliquis prominentibus subarcuatis; capitula axillaria solitaria 1.5

cm. longe pedunculata, pedunculo dense minute puberulo, capitulis

dense plurifloris corollis exclusis 8 mm. diam.; calyx brevis trun-

catus minute puberulus; corolla alba 1 cm. longa dense puberula.—

Guatemala: Hilly pine forest, near Quirigua, Dept. Izabal, alt. 150

meters, April 26, 1939, Paul C. Standley 72368 (type in Herb. Field

Mus.).

This plant is described with some hesitation, but it is difficult to

place it with any of the three other species known from the Central

American region. The size of the leaves indicates its relationship

with M. panamensis Seem., but in that the leaves are glabrous, and

average distinctly broader than in M. asperula. M. yucatanensis

Greenm., of the Yucatan region, has pubescent leaves, but they are

much smaller and narrower, and the pubescence much more ample

and of different quality.

Rondeletia chiapasensis Standl., sp. nov. — Frutex, ramulis

crassiusculis subteretibus rubescentibus densissime pilis longiusculis

patentibus vel adscendentibus mollibus villoso-pilosis, internodiis

brevibus; stipulae e basi triangulari longe anguste subulato-attenu-

atae 6-7 mm. longae dense pilosulae; folia modica breviter petiolata

membranacea, petiolo crasso 5-10 mm. longo dense breviter piloso;

lamina anguste oblongo-lanceolata 10.5-14 cm. longa 3-4 cm. lata

STUDIES OF AMERICAN PLANTS — IX 55

longe anguste attenuatoacuminata, basi acuta, supra in sicco viridis

dense pilis albidis longis vel brevibus patentibus vel subadpressis

gracilibus sat dense pilosa, subtus pallidior densissime pilis longis

laxis pallidis lucidis piloso-tomentosa, costa gracili prominente,

nervis lateralibus utroque latere ca. 10 prominulis gracillimis angulo

semirecto vel angustiore adscendentibus; inflorescentia spiciformis

7.5 cm. longa 2 cm. lata 4.5 cm. longe pedunculata erecta, rhachi

crassa rubescente dense breviter pilosa, floribus in cymulas parvas

densas sessiles dispositis, bracteis paucis filiformibus usque 4 mm.

longis; hypanthium sicut calyx dense pilis adscendentibus hirtellum

1 mm. longum hemisphaericum, sepalis lanceolato-oblongis aequi-

longis vel paullo longioribus erectis acutis; corolla extus dense

strigosa, tubo ca. 10 mm. longo crassiusculo fauce dense villoso-

barbato et fere 2 mm. lato, lobis 4 rotundatis 3 mm. longis. — Mexico:

Cascarada, Chiapas, December 31, 1936, E. Matuda 1064 (type in

Herb. Univ. Michigan).

In general appearance as well as in details the plant is similar to

R. rufescens Robinson of Guatemala. In that the corolla is glabrous

in the throat and has a much more slender tube.

Rondeletia Mexiae Standl., sp. nov. — Frutex 2-metralis, ramis

gracilibus teretibus ferrugineis, novellis dense pilis adscendentibus

vel subpatentibus brevibus fulvidis pilosis, internodiis plerumque

elongatis; stipulae subpersistentes ovato-triangulares ca. 4 mm.

longae acutae sparse strigosae erectae; folia mediocria breviter petio-

lata membranacea, petiolo gracili 6-11 mm. longo dense breviter

piloso; lamina ovata usque elliptica 7-10.5 cm. longa 3.5-5.5 cm.

lata subabrupte longe angusteque attenuato-acuminata, basi rotun-

data vel obtusa, supra in sicco viridis sparse breviter patenti-pilosa,

subtus paullo pallidior, ad nervos venasque sparse breviter albido-

pilosa, costa gracili elevata, nervis lateralibus utroque latere ca. 6

gracillimis prominentibus valde arcuatis angulo semirecto vel paullo

latiore oblique adscendentibus; inflorescentia terminalis cymoso-

paniculata sessilis e basi trichotoma usque 5.5 cm. longa, floribus

paucis vel numerosis ad apices ramorum dense aggregatis sessilibus

vel brevissime pedicellatis, ramis dense patenti-hirsutulis, bracteis

deciduis elongatis filiformibus vel linearibus hirsutulis; hypanthium

obconicum 3-4 mm. longum densissime hirsutum; sepala 4 foliacea

viridia paullo inaequalia 7-10 mm. longa lanceolata attenuata

utrinque dense subadpresse pilosa; corolla ut dicitur alba (aperta

non visa) extus densissime pilis longis albidis subadpressis hirsuta

in alabastro 1.5 cm. longa, lobis ut videtur tubo plus quam duplo

56 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. 22

brevioribus. — Mexico: State of Oaxaca, Distrito Choapam, Mon-

tana Santa Maria, in undergrowth in partial shade of forest, alt.

1,500 meters, April 1, 1938, Ynes Mexia 9261 (type in Herb. Field

Mus.).

An unusually well marked species, clearly to be associated with

Rondeletia hondurensis Bonn. Smith, which differs in having the

leaves arachnoid-tomentose beneath, and in many other details.

Rudgea magna Standl., sp. nov. — Frutex(?) glaber, ramulis

crassiusculis, internodiis brevibus; stipulae deciduae, non visae, intus

basi setulis numerosis incrassatis corneis pallidis persistentibus 1 mm.

longis auctae; folia inter maxima breviter petiolata chartacea, petiolo

crasso ca. 1.5 cm. longo; lamina oblongo-elliptica usque late elliptica

17-22 cm. longa 8-12.5 cm. lata, apice abrupte contracta atque

breviter cuspidato-acuminata, basi acuta vel cuneato-contracta,

supra viridis, costa nervisque manifestis, opaca, subtus fere concolor,

sublucida, costa gracili elevata, nervis lateralibus utroque latere

ca. 10 angulo fere recto divergentibus teneris arcuatis juxta marginem

conjunctis, nervulis inconspicuis; inflorescentia parva terminalis

ut videtur pauciflora 2.5 cm. longe pedunculata, floribus pedicellatis;

fructus juvenilis subglobosus 13 mm. longus 10 mm. latus; calyx

ad apicem fructus persistens fere 1 cm. longus atque 8 mm. latus

subtruncatus; corolla extus glabra, tubo 1.5 cm. longo prope apicem

4 mm. crasso, lobis 5 lanceolato-oblongis recurvis tubo duplo bre-

vioribus.— Panama: Hills of Sperdi, near Puerto Obaldia, San Bias

Coast, alt. 20-200 meters, September, 1911, H. Pittier 4350 (type

in Herb. Field Mus.).

The single specimen at hand bears only a partial inflorescence

and a detached corolla, consequently it is impossible to state what

the form of a complete and perfect inflorescence may be. The species

differs from all others known from Central America in its very

large leaves, and notably in the large flowers.

Sickingia(?) ecuadorensis Standl., sp. nov. — Frutex, ramulis

crassis teretibus subdense patenti-pilosis ochraceis, internodiis superi-

oribus brevibus; folia magna breviter petiolata crasse membranacea,

petiolo crasso 12 mm. longo dense piloso; lamina late cuneato-

obovata ca. 28 cm. longa atque 16 cm. lata, apice late obtusa et

brevissime abrupte apiculato-acuminata, e medio basin versus sensim

cuneato-angustata, basi ipsa anguste rotundata vel obtusa, supra

in sicco fusco-viridis opaca sparse pilis rigidis patentibus brevibus

hirsuta vel glabra, nervis manifestis sed non elevatis, subtus paullo

STUDIES OF AMERICAN PLANTS — IX 57

pallidior ubique sparse breviter brunneo-hirsuta, costa crassa pro-

minente, nervis lateralibus utroque latere circiter 25 angulo fere

recto divergentibus prominentibus gracilibus fere rectis prope

marginem arcuato-conjunctis venulis remotis transversis irregulari-

bus connexis, venulis ultimis arete reticulatis; inflorescentia (tantum

in statu fructifero visa) ut videtur cymoso-paniculata; lobus 1

calycis in laminam magnam foliaceam 3-4.5 cm. longe petiolatam

expansus, lamina late ovata vel rotundato-ovata ca. 8 cm. longa

et 5-6 cm. lata obtusa, basi abrupte contracta et ca. 7-nervia, nervis

fere ad apicem protractis, supra sparse hirtella, subtus praesertim

ad venas pilosa, venis prominentibus laxe reticulatis; capsula sub-

globosa 4 cm. longa 5 cm. lata basi et apice late rotundata bilocularis;

semina horizontalia numerosa valde compressa oblongo-semiorbicu-

laria pallida et roseo tincta, ala inclusa 2.5 cm. longa 1 cm. lata,

ala parte seminifera longiore. — Ecuador: In regione tropica sicca

in sylvulis prope Guayaquil, January, 1936, Luis Mille 884 (type in

Herb. Field Mus.).

The fruit is exactly that of the genus Sickingia, but I do not

believe that the tree belongs to that genus. Flowers probably will

show that it represents an undescribed generic group, for it can not

well be associated with any of the known genera in which the calyx

lobes are expanded into a large, foliaceous limb.

Sickingia hadrantha Standl., sp. nov. — Arbor 10-metralis,

trunco 80 cm. diam., ramulis crassis teretibus sordido-ferrugineis

lenticellatis, novellis breviter pilosulis; stipulae non visae; folia

majuscula breviter petiolata subcoriacea, petiolo 1-1.5 cm. longo

crassiusculo glabro; lamina oblongo-obovata vel elliptico-oblonga

15-18 cm. longa et ultra 6.5-10 cm. lata subabrupte acuminata,

basi anguste rotundata usque subacuta, glabra, supra in sicco

fuscescens lucida, costa nervisque prominentibus, subtus fere con-

color brunnescens, costa elevata, nervis lateralibus utroque latere

ca. 12 gracilibus prominentibus arcuatis angulo lato adscendentibus,

venulis prominentibus vel prominulis laxe reticulatis; inflorescentia

cymoso-paniculata corymbiformis sessilis ca. 10 cm. longa atque

10-12 cm. lata densissime multiflora basi trichotoma, ramis crassis

adscendentibus vel suberectis repetite trichotomis dense breviter

brunneo-pilosulis, bracteis interdum foliaceis, saepius linearibus et

usque 8 mm. longis, floribus dense aggregatis sessilibus; hypanthium

glabrum turbinatum 1.5-2 mm. longum; calyx 1.5 mm. longus pro-

funde dentatus, dentibus triangularibus acutis vel acuminatis erectis

glabris; corolla alba campanulata vel fere urceolata 4 mm. longa

58 FIELD MUSEUM OF NATURAL HISTORY— BOTANY, VOL. 22

extus glabra, lobis brevissimis obtusis latioribus quam longis, fauce

dense albo-barbata, pilis extrusis; antherae longiexsertae vix ultra

1 mm. longae; stylus breviter exsertus. — Peru: On river bank,

Gamitanacocha, Rio Mazan, Dept. Loreto, alt. 100-125 meters,

March 5, 1935, Jose M. Schunke 347 (type in Herb. Field Mus.).

A related species is Sickingia tinctoria (HBK.) Schum., of the

same region, which differs in its larger corolla and anthers.

Syringantha loranthoides Standl. Field Mus. Bot. 8: 153.

1930. — The genus Syringantha, a well marked one, related to Exo-

stema, was based upon four collections in the Leningrad herbarium,

all obtained in Mexico by Karwinsky. There has come to hand a

recent collection, the only one, so far as known, made during the

past century: Mexico: Tamazunchale, San Luis Potosi, September,

1938, L. A. Kenoyer A266. The specimens at first glance remind

one somewhat of Hamelia, because of the form of the inflorescence

and of the buds. In the recent collection the leaves are somewhat

larger than originally described, being as much as 8 cm. long and

22 mm. wide.

Tobagoa maleolens Urban, Repert. Sp. Nov. 14: 343. 1916.

— This monotypic genus was described from Tobago, and is known

to occur in the region of Caracas, Venezuela, where it appears to be

rather frequent. A single recent collection establishes the fact that

its range extends to Central America: North rim of El Valle de

Anton, Prov. Code", Panama, at 600-1,000 meters, February, 1939,

P. H. Allen 1666; an herb 1 meter high, the flowers white.

VALERIANACEAE

Valeriana cucurbitifolia Standl., sp. nov. — Herba ut videtur

alta atque erecta, caulibus crassissimis in sicco usque 12 mm. crassis

fistulosis ad nodos pilosulis, aliter glabris vel glabratis, internodiis

valde elongatis; folia membranacea simplicia, caulina atque basalia

conformia, longipetiolata, petiolis infimis usque 15 cm. longis spar-

sissime pilosis vel fere omnino glabris, foliorum caulinorum brevi-

oribus ca. 4 cm. longis; lamina vulgo reniformi-orbicularis interdum

paullo angulata usque 18 cm. longa atque aequilata acuta, basi

profunde cordata, sinu aperto, ima basi abrupte contracta et breviter

cuneato-decurrens, in margine grosse undulato-dentata, dentibus

brevibus late triangularibus obtusis, utroque latere tantum ad

nervos venasque sparse breviter pilosa, interdum fere omnino

glabra, subtus vix pallidior; inflorescentia magna longipedunculata

STUDIES OF AMERICAN PLANTS — IX 59

ca. 16 cm. alta et aequilata laxe multiflora, repetite dichotoma cymi-

formis, bracteis linearibus, infimis 1.5 cm. longis, superioribus multo

brevioribus, ultimis numerosissimis atque imbricatis viridibus

attenuates, floribus cymosis vel breviter spicatis sessilibus; fructus

(juvenilis tantum visus) ca. 2.5 mm. longus in sectione lanceolatus

basi rotundatus, sensim apicem versus attenuatus, nervoso-angulatus,

pappi setis longis albidis plumosis. — Mexico: Tablas, Siltepec,

Chiapas, August 8, 1937, E. Matuda 1709 (type in Herb. Field Mus.;

duplicate in Herb. Univ. Michigan).

Well marked by the large leaves, which in general appearance

are remarkably like those of some species of Cucurbita.

Valeriana LeSueurii Standl., sp. nov. — Herba perennis ca. 75

cm. alta, caulibus singulis infra inflorescentiam simplicibus crassius-

culis teretibus ca. 3.5 mm. crassis, internodiis valde elongatis, infimis

densissime pilis brevibus albidis patentibus pilosulis, superioribus

fere glabris; folia basalia longipetiolata membranacea, petiolo crasso

1.5 cm. longo minute pilosulo, lamina oblongo-obovata ca. 3.5 cm.

longa atque 1.5 cm. lata apice rotundata, basi cuneato-attenuata,

integra, supra dense minutissime albido-pilosula, subtus aequaliter

vel sparsius pilosula concolore; folia caulina sessilia opposita vel

verticillata profunde pinnato-partita ca. 3 cm. longa, segmentis

linearibus vel fere teretibus rigidiusculis; inflorescentia valde elon-

gata laxissima anguste racemoso-paniculata, ramis vulgo quaternis

brevibus flexuosis sursum incurvis gracillimis glabris vel puberulis,

floribus sessilibus dense in cymulas paucifloras capituliformes

aggregatis, bracteis viridibus lanceolatis vel ovatis, inferioribus 3.5

mm. tantum longis, supremis parvis acutis vel acuminatis; corolla

alba extus glabra 1.5 mm. tantum longa, lobis latis brevissimis apice

rotundatis, antheris breviter exsertis. — Mexico: Mesa Correo, Chi-

huahua, July 2, 1936, Harde LeSueur 1077 (type in Herb. Field Mus.).

Well marked among the species of northern Mexico by the short,

entire basal leaves, rounded at the apex. Possibly conspecific is

Gentry 2739 from Memelichi, Rio Mayo, Chihuahua, at 2,250

meters. This collection is in mature fruit. Since it has no basal

leaves and the form of the inflorescence is somewhat different from

the LeSueur type, it may be that two distinct species are involved.

Valeriana Skutchii Standl., sp. nov. — Herba perennis erecta

plus minusve caespitosa, caulibus inferne simplicibus crassiusculis

3-5 mm. crassis interdum fistulosis ubique sparse pilis longiusculis

patentibus pilosis, internodiis valde elongatis; folia basalia longi-

60 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. 22

petiolata subcarnosa, petiolo 4-6 cm. longo basi dilatato fere glabro;

lamina lineari-oblanceolata 3-11 cm. longa usque 1 cm. lata obtusis-

sima vel obtusa, basin versus longe sensim attenuata, integra vel

obscure undulato-dentata glabra, tantum in incisuris marginis

breviter albo-barbata; inflorescentia usque 17 cm. longa atque fere

aequilata laxa multiflora trichotoma vel superne repetite dichotoma,

bracteis linearibus ca. 1 cm. longis, superioribus viridibus similibus

sed multo brevioribus, floribus parvis sessilibus in cymulas parvas

paucifloras vulgo pedicellatas dispositis; corolla alba extus glabra,

lobis oblongis obtusis patentibus ca. 2 mm. longis, tubo sursum

dilatato aequilongo; filamenta longe exserta; fructus lanceolato-

ovoideus ca. 2.5 mm. longus basi rotundatus dense breviter patenti-

pilosus vel interdum glaber. — Guatemala: Open pine woods, Sierra

de los Cuchumatanes, Dept. Huehuetenango, alt. 3,330 meters,

September 15, 1934, Alexander F. Skutch 1240 (type in Herb. Field

Mus.). Volcan de Santa Maria, in open, sunny stand of pine, Dept.

Quezaltenango, alt. 3,550 meters, July, 1934, Skutch 853. — Mexico:

Chiapas, Ghiesbreght 801.

Noteworthy for the numerous narrow, almost entire basal leaves.

Both pilose and glabrous achenes exist on different inflorescences

(detached) of the type sheet, and I judge that the variation in fruit

pubescence must be an individual variation. The middle cauline

leaves are lance-linear, dilated toward the base, and as much as 6.5

cm. long.

COMPOSITAE

Aster Gentry! Standl., sp. nov. — Subgenus Machaeranthera.

Herba biennis(?) erecta 40 cm. alta vel ultra ut videtur inferne

simplex, caule superne pauciramoso crassiusculo viridi striato ubique

sat dense, superne densissime, glanduloso-villoso internodiis foliis

brevioribus; folia caulina numerosa sessilia oblonga vel lanceolato-

oblonga 2-4 cm. longa atque 8-10 mm. lata vel ultra, obtusa vel

acuta, basi rotundata vel subcordata et plus minusve amplexicaulia

integra vel subintegra, ubique breviter glanduloso-pilosula vel

glanduloso-scabra, interdum plus minusve glabrata; folia inflores-

centiae multo reducta et fere bracteiformia plerumque 8-12 mm.

longa ovata amplexicaulia; capitula pauca ad apices ramorum

singula vel aggregata breviter vel longe pedunculata, disco fere 1.5

cm. lato; phyllaria subaequalia viridia 5-6 mm. longa linearia subu-

lato-attenuata dense glanduloso-pilosula; radii numerosissimi line-

ares atque paullo ultra 1 cm. longi; achaenia juvenilia hispidula,

pappi setis albidis 4 mm. longis; corolla 4-5 mm. longa. — Mexico:

STUDIES OF AMERICAN PLANTS — IX 61

Memelichi, Rio Mayo, Chihuahua, meadow margin, among pines,

alt. 2,250 meters, September 15, 1936, Howard Scott Gentry 2728

(type in Herb. Field Mus.).

The rays are described as purple, the disk as yellow.

Brickellia Hinckleyi Standl., sp. nov. — Herbacea 60 cm. alta

et ultra, caulibus erectis rigidis ut videtur inferne simplicibus,

superne paullo ramosis teretibus viridibus sat dense pilis patentibus

crassiusculis albidis glanduloso-villosis, internodiis brevibus; folia

omnia nisi infima alterna parva rigido-herbacea sessilia vel brevis-

sime petiolata, petiolo vix ultra 2 mm. longo; lamina lanceolata vel

lanceolato-ovata 2.5-4 cm. longa 8-14 mm. lata, foliis supremis

paullo reductis, longe angusteque attenuato-acuminata, basi late

breviter cuneata, serrata vel subintegra, dentibus paucis, supra glan-

duloso-scabra, subtus densius glanduloso-hirtella, trinervia; capitula

magna pauca ramos axillares paucifoliatos terminantes vel apice

caulis pauca et corymbosa, campanulata pappo incluso 15 mm.

longa atque ca. 1 cm. lata, pedunculis gracilibus erectis glanduloso-

villosis; phyllaria laxe imbricata viridia multistriata, interiora lanceo-

lato-linearia longe sensim attenuata, exteriora multo breviora

oblongo-ovata caudato-cuspidata, omnia villoso-ciliata atque plus

minusve glandulosa; flores ca. 24; achaenia 4.5 mm. longa dense

sericea. — Texas: Madera Canyon, near Livermore, Davis Mountains,

August 27, 1939, L. C. Hinckley 1225 (type in Herb. Field Mus.).

In a region in which so much collecting has been done as in the

Davis Mountains, it is decidedly surprising to find a new plant so

distinct as this one appears to be. It may well be that specimens of

it are preserved in other herbaria, but none were available to Dr.

Robinson when he published his monograph of the genus. Brickellia

Hinckleyi is obviously related to B. Wislizeni Gray, of Chihuahua

and Durango. In the Mexican plant, however, nearly all the leaves

are opposite, rounded or cordate at the base, and varying from

narrowly rounded to merely acute at the apex. The heads of the

Texas plant, although similar in size to those of B. Wislizeni, have

only half as many achenes.

Cacalia pratensis Standl., sp. nov. — Herba perennis erecta

60 cm. alta vel ultra rigida, caulibus singulis(?) crassiusculis striatis

glabris vel in statu juvenili plus minusve adpresso-pilosis, internodiis

bene elongatis; folia basalia longipetiolata crassiuscula et subrigida,

petiolo 11-22 cm. longo prope basin paullo dilatato fere omnino

glabro; lamina latissime ovato-cordata vel reniformi-cordata 5-11

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62 FIELD MUSEUM OF NATURAL HISTORY — BOTANY, VOL. 22

cm. longa 5.5-9.5 cm. lata, apice obtusissima vel subrotundata,

basi profunde (1.5-3.5 cm.) cordata, sinu aperto lato, lobis basalibus

subrotundatis, toto margine undulato-dentato, dentibus brevibus

latis obtusissimis, supra sparse villosa vel in statu juvenili forsan

laxe tomentosa, subtus ad venas nervosque sparsissime breviter

tomentulosa vel fere glabra penninervia; folia caulina multo minora

ovata, petiolo latissime alato atque vaginante, foliis supremis ad

vaginas reductis 2-2.5 cm. tantum longis; inflorescentia ad capitu-

lum singulum multicapitatum 2.5-3 cm. diam. pedunculatum reducta,

bracteis extimis linearibus foliaceis usque 1.5 cm. longis; involucrum

8 mm. altum, phyllariis ca. 8 glabris oblongo-ovatis acutiusculis

prope apicem albo-ciliatis arete imbricatis; corolla glabra 6-7 mm.

longa; achaenia anguste columnaria nigrescentia 4 mm. longa, pappo

albo fere aequilongo. — Mexico: Very wet meadow near San Juanito,

Distrito de Bocoyna, Chihuahua, alt. 2,430 meters, July 26, 1937,

Forrest Shreve 8031 (type in Herb. Field Mus.). Memlichi, Rio Mayo,

Chihuahua, in transition zone among pines, alt. 2,250 meters,

September, 1936, Howard Scott Gentry 2785; aquatic, a small colony

in meadow seep.

Verbesina Gentry! Standl., sp. nov. — Herba erecta inferne

ut videtur simplex 50 cm. alta et ultra, caule crasso dense scabro

vel hirtello fere ad capitula alato, alis viridibus integris usque 4 mm.

latis; folia opposita majuscula sessilia et longe basi in alas decurrentia,

ovata vel rhombico-ovata, caulina usque 14 cm. longa et 8 cm. lata

acuta vel acuminata dentata vel grosse dentata, crassa, utrinque

scaberrima; capitula numerosa corymbosa, inflorescentia usque 30

cm. longa, pedunculis ultimis graciusculis exalatis brevibus dense

viscido-hirtellis et scabris, capitulis campanulatis radiatis 5-6 mm.

altis 7-10 mm. latis luteis; phyllaria vix ad 3 mm. longa inaequalia

oblonga acuta hispidula; radii pauci lineares 5-7 mm. longi lutei;

paleae disci latae apice apiculato-rotundatae glabrae. — Mexico:

Guasaremos, Rio Mayo, Chihuahua, in valley margins, August 23,

1936, Howard Scott Gentry 2416 (type in Herb. Field Mus.).

The heads are in young flower, and it is impossible to determine

the nature of the achenes. The collector describes the plant as a

tall, slender herb with orange heads. Its relationship is with Ver-

besina pterocaula DC., of southern Mexico, which differs conspicu-

ously in its larger heads as well as in several other respects.