Taxonomic Utility of Lemma Micromorphological Characters in the SPOROBOLUS COMPOSITUS and SPOROBOLUS VAGINIFLORUS Complexes (Poaceae)

摘要

Five lemma micromorphological characters including bicellular microhairs, hooks, long cells, prickles, and silica cells of six Sporobolus taxa representing the S. compositus and S. vaginiflorus complexes in Texas were investigated using scanning electron microscopy (SEM). Our study supplements earlier SEM treatments of Sporobolus in Valdés-Reyna & Hatch and Liu et al. and colleagues. The micromorphological differences found by our study support the taxonomic treatment of these two complexes by Peterson et al.