JSTOR

Isotype of Penstemon aboriginum M.E.Jones [family SCROPHULARIACEAE] Penstemon aboriginum Jones, M.E., #s.n. 1906-05-07 United States

Isotype of Penstemon acaulis L. G. Williams [family SCROPHULARIACEAE] Penstemon acaulis Williams, L. (Amer.), #407 1932-05-28 United States

Isotype of Penstemon acuminatus Douglas ex Lindl. var. latebracteatus N. H. Holmgren [family SCROPHULARIACEAE] Penstemon acuminatus latebracteatus Holmgren, N.H.; Holmgren, P.K., #8741 1978-05-21 United States

Isotype of Penstemon albifluvis England [family SCROPHULARIACEAE] Penstemon albifluvis England, J.L., #2046 1980-06-09 United States

Isotype of Penstemon albomarginatus M. E. Jones [family SCROPHULARIACEAE] Penstemon albomarginatus Jones, M.E., #s.n. 1905-04-30 United States

Isotype of Penstemon alluviorum Small [family SCROPHULARIACEAE] Penstemon alluviorum Pennell, F.W., #11504 1923-06-07 United States

Holotype of Penstemon ambiguus Torr. subsp. laevissimus D. D. Keck [family SCROPHULARIACEAE] Penstemon ambiguus laevissimus Clokey, I.W., #8113 1938-06-07 United States

Holotype of Penstemon ambiguus Torr. subsp. laevissimus D. D. Keck [family SCROPHULARIACEAE] Penstemon ambiguus laevissimus Clokey, I.W., #8113 1938-06-07 United States

Isotype of Penstemon ambiguus Torr. subsp. laevissimus D. D. Keck [family SCROPHULARIACEAE] Penstemon ambiguus laevissimus Clokey, I.W., #8113 1938-06-07 United States

Isotype of Penstemon ammophilus N. H. Holmgren & L. Shultz [family SCROPHULARIACEAE] Penstemon ammophilus Shultz, L.M.; Anderson, J., #5349 1981-06-14 United States

Holotype of Penstemon anguineus Eastw. [family SCROPHULARIACEAE] Penstemon anguineus Eastwood, A., #s.n. 1903-06-21 - 1903-06-27 United States

Isotype of Penstemon angustifolius Nutt. ex Pursh var. vernalensis N. H. Holmgren [family SCROPHULARIACEAE] Penstemon angustifolius vernalensis Holmgren, N.H.; Holmgren, P.K.; Barneby, R.C., #8748 1978-05-25 United States

Holotype of Penstemon apateticus Straw [family SCROPHULARIACEAE] Penstemon apateticus Pringle, C.G., #6463 1896-08-01 - 1896-09-01 Mexico

Isotype of Penstemon arenarius Greene [family SCROPHULARIACEAE] Penstemon arenarius Shockley, W.H., #348 None United States

Holotype of Penstemon assurgens D. D. Keck [family SCROPHULARIACEAE] Penstemon assurgens Davis, R.J., #441 1938-06-28 United States

Isotype of Penstemon attenuatus Douglas ex Lindl. subsp. hyacinthinus Pennell [family SCROPHULARIACEAE] Penstemon attenuatus hyacinthinus Pennell, F.W., #20879 1937-07-12 United States

Isotype of Penstemon attenuatus Douglas ex Lindl. subsp. hyacinthinus Pennell [family SCROPHULARIACEAE] Penstemon attenuatus hyacinthinus Francis W.Pennell, #20879 1937-07-12 United States

Isotype of Penstemon attenuatus Douglas ex Lindl. f. multicolor Pennell [family SCROPHULARIACEAE] Penstemon attenuatus multicolor Pennell, F.W., #20926 1937-07-16 United States

Isotype of Penstemon attenuatus Douglas ex Lindl. var. varians A. Nelson [family SCROPHULARIACEAE] Penstemon attenuatus varians Macbride, J.F., #974 1911-06-23 United States

Holotype of Penstemon austinii Eastw. [family SCROPHULARIACEAE] Penstemon austinii Austin, S.W., #187 1899-07-04 United States