Flora of North America species comparison

30-130 cm.

to 100 cm;

nodes hispid, hairs appressed.

glabrous;

ligules ciliate;

blades 4-10 mm wide, loosely twisted, adaxial surfaces with papillose-based hairs basally.

glabrous or pilose, margins ciliate distally;

ligules about 1 mm, ciliate;

blades 15-30 cm long, 4-7 mm wide, flat, scabrous or pubescent.

3-15 cm, uniformly thick, erect, densely spicate;

rachises hispid;

bristles 4-12, 3-8 mm, antrorsely scabrous.

3-15 cm, densely spicate;

rachises rough hispid and sparsely villous;

bristles 1-3, 5-15 mm, flexible, antrorsely scabrous.

2-3.4 mm, strongly turgid.

about 2 mm, turgid.

about 1/3 as long as the spikelets, 3-veined, acute;

upper glumes about 1/2 as long as the spikelets, 5-veined, ovate;

upper florets often staminate;

lower lemmas equaling the upper lemmas;

lower paleas equaling the lower lemmas, broad;

upper lemmas conspicuously exposed, strongly transversely rugose.

1/3 – 1/2 as long as the spikelets, 3-5-veined;

upper glumes about 3/4 as long as the upper lemmas, 5-7-veined;

lower lemmas equaling the upper lemmas;

lower paleas 3/4 as long as the lower lemmas, hyaline;

upper lemmas very coarsely and transversely rugose;

upper paleas similar to the upper lemmas.

= 36, 72.

= unknown.