Flora of North America species comparison

30-130 cm.

50-150 cm, flattened;

nodes glabrous.

glabrous;

ligules ciliate;

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

glabrous;

blades 15-50 cm long, 4-10 mm wide, flat, rather lax.

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

rachises hispid;

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

5-25 cm long, 4-8 mm thick (excluding the bristles), densely spicate;

bristles 5 or more, 3-6 mm, usually orange to purple.

2-3.4 mm, strongly turgid.

2.5-3 mm, elliptic-oblong.

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 as long as the spikelets;

upper florets staminate;

upper glumes Vi-A as long as the spikelets;

lower lemmas equaling the upper lemmas;

lower paleas equaling the upper paleas, broad;

upper lemmas finely and transversely rugose;

upper paleas similar to the upper lemmas.

= 36, 72.

= 36, 54.