JSTOR

Holotype of Xanthocephalum gymnospermoides (A. Gray) A. Gray var. intermedium M. A. Lane [family ASTERACEAE] Xanthocephalum gymnospermoides intermedium Lane, M. A.; Longstreth, D. W., #2479 1978-08-23 Mexico

Isotype of Xanthocephalum petradoria S. L. Welsh & Goodrich [family ASTERACEAE] Xanthocephalum petradoria Goodrich, S., #15240 1980-09-24 United States

Isotype of Xerophyta seinei Behnke, K.Kramer & E.Hummel [family VELLOZIACEAE] Xerophyta seinei Seine, R., #615 1993-12-10 Mexico

Isotype of Xerophyta seinei Behnke, K. Kramer, E. Hummel [family VELLOZIACEAE] Xerophyta seinei Seine, R., #615 1993-10-12 Zimbabwe

Holotype of Xylorhiza glabriuscula Nutt. var. linearifolia T. J. Watson [family ASTERACEAE] Xylorhiza glabriuscula linearifolia Watson Jr., T. J., #679 1971-05-21 United States

Holotype of Xylothamia truncata G. L. Nesom [family ASTERACEAE] Xylothamia truncata Nesom, G. L.; Scott, R.; Lavin, M., #5254 1985-10-18 Mexico

Holotype of Xyris chapmanii E. L. Bridges & Orzell [family XYRIDACEAE] Xyris chapmanii Orzell, S. L.; Bridges, E. L., #8714 1988-10-08 United States

Isotype of Xyris correlliorum E. L. Bridges & Orzell [family XYRIDACEAE] Xyris correlliorum Orzell, S. L.; Bridges, E. L., #23809 1995-09-05 United States

Holotype of Xyris louisianica E. L. Bridges & Orzell [family XYRIDACEAE] Xyris louisianica Orzell, S. L.; Bridges, E. L., #5800 1987-09-24 United States

Isotype of Xyris louisianica E. L. Bridges & Orzell [family XYRIDACEAE] Xyris louisianica Orzell, S. L.; Bridges, E. L., #5800 1987-09-24 United States

Isotype of Xyris mexiae Malme [family XYRIDACEAE] Xyris mexiae Mexia, Y., #4292 1930-02-01 Brazil

Isotype of Yermo xanthocephalus Dorn [family ASTERACEAE] Yermo xanthocephalus Dorn, R., #5093 1990-06-28 United States

Holotype of Yucca cernua E. L. Keith [family AGAVACEAE] Yucca cernua Keith, E. L., #183 2002-06-11 United States

Isoneotype of Yucca flaccida Haworth [family AGAVACEAE] Yucca flaccida Ward, D. B.; Weber, J. T., #10736 2003-05-19 United States

Isotype of Zaluzania anthemidifolia B. L. Rob. & Greenm. [family ASTERACEAE] Zaluzania anthemidifolia Pringle, C. G., #5156 1893-09-23 Mexico

Holotype of Zaluzania delgadoana B. L. Turner [family ASTERACEAE] Zaluzania delgadoana Garcia P., J.; Delgado S., A., #873 1978-11-06 Mexico

Isotype of Zaluzania pringlei Greenm. [family ASTERACEAE] Zaluzania pringlei Pringle, C. G., #8710 1902-10-18 Mexico

Isotype of Zapoteca ravenii H. M. Hern. [family FABACEAE] Zapoteca ravenii Martínez S., E.; Soto A., M. A., #18783 1986-06-17 Mexico

Isotype of Zapoteca tehuana H. M. Hern. [family FABACEAE] Zapoteca tehuana Hernández, H., #950 1986-01-15 Mexico

Isotype of Zea diploperennis Iltis, Doebly & R. Guzmán [family POACEAE] Zea diploperennis Iltis, H. H.; Guzmán, R.; Doebley, J.; Lasseigne, A., #450 1978-09-22 Mexico