Flora of North America species comparison

30-130 cm.

40-100 cm.

glabrous;

ligules ciliate;

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

villous distally, margins ciliate;

ligules about 1 mm, densely ciliate, hairs white;

blades 15-30 cm long, 5-8 mm wide, both surfaces villous.

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

rachises hispid;

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

10-20 cm, loosely spicate;

bristles usually solitary, 10-20 mm.

2-3.4 mm, strongly turgid.

2.8-3 mm.

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.

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

upper glumes nearly equaling the spikelets, 5-7-veined;

lower lemmas equaling the upper lemmas, 5-veined;

lower paleas about 1/5 as long as the upper paleas, lanceolate;

upper lemmas finely and transversely undulate-rugose basally, striate and punctate distally;

upper paleas similar, ovate-lanceolate.

= 36, 72.

= 54.