9.(7) Pistillate spikelets below staminate spikelets on the inflorescence branch, glume texture indurate Tripsacum (Hitchcock 1951) (Hitchcock 1951) 9. Pistillate spikelets above staminate spikelets on the inflorescence branch, glume texture leaf-like 10 (Gould 1975) (Gould 1975)