Schizachyrium microstachyum (Desv. ex Ham.) Roseng., B.R. Arrill. & Izag.

Dorneles Welker, Cassiano A. & Peichoto, Myriam Carolina, 2015, Considerations on the genus Schizachyrium (Poaceae-Andropogoneae) in Central America and West Indies, and confirmation of the occurrence of S. glaziovii, Phytotaxa 201 (1), pp. 87-95 : 95

Schizachyrium microstachyum (Desv. ex Ham.) Roseng., B.R. Arrill. & Izag. ( Figs. 1H–K , 2E–F ).

Type:— WEST INDIES. Desvaux 8 (holotype P!, isotype US! [fragm. ex P]).

A large number of specimens of Schizachyrium condensatum and S. microstachyum from different countries was also examined. These herbarium specimens are listed in Peichoto (2010) and Welker & Longhi-Wagner (2012b).

Figures

FIGURE 1. Illustrations of the type materials of Schizachyrium glaziovii and morphologically similar species in Central America and West Indies.A–C. Schizachyrium condensatum (Humboldt & Bonpland s.n., P). A. inflorescence. B. raceme with the spatheole. C. pair of spikelets and rachis internode. D–G. Schizachyrium glaziovii (Glaziou 2739, P). D. inflorescence. E. raceme with the spatheole. F. open spatheole with the peduncle included within it. G. pair of spikelets and rachis internode. H–K. Schizachyrium microstachyum (Desvaux 8, P). H. inflorescence. I. raceme with the spatheole. J. convolute spatheole with the superior portion of the peduncle exserted at maturity. K. pair of spikelets and rachis internode. Illustrations by Liliana Gómez.

FIGURE 2. Photos of Schizachyrium glaziovii and morphologically similar species in the field. A–B. Schizachyrium condensatum (Longhi-Wagner & Welker 10757, ICN – Brazil). A. habit. B. inflorescence. C–D. Schizachyrium glaziovii (Longhi-Wagner & Welker 10577, ICN – Brazil). C. habit. D. inflorescence. E–F. Schizachyrium microstachyum (Welker 203, ICN – Brazil). E. inflorescence. F. habit. Photo credit: H.M. Longhi-Wagner (A–D), C.A.D. Welker (E, F).