Flora of North America species comparison

1-2 m.

60-120 cm, rarely branched distally, scabrous below the nodes and panicles.

strigose, margins with stiff hairs;

collars hispid;

ligules about 2 mm, of hairs;

blades to 50 cm long, 20-80 mm wide, plicate, tapering at both ends, abaxial surfaces sparsely strigose, adaxial surfaces short pubescent near the base.

keeled, glabrous, usually with a few white hairs at the throat;

ligules 2-4 mm, densely ciliate;

blades 15-20 cm long, 7-15 mm wide, flat, adaxial surface scabrous.

to 40 cm, open;

branches 6-10 cm, loosely flexible, axes scabrous;

bristles solitary, usually present only below the terminal spikelet on each branch, occasionally below non-terminal spikelets, about 5 mm.

10-30 cm long, 1-2 cm wide, uniformly thick from the base to the apex, dense, rarely lobed basally;

rachises scabrous and loosely pilose;

bristles usually solitary, 10-20 mm, soft, antrorsely scabrous.

3-4 mm, elliptic, acuminate.

2-2.3 mm, subspherical.

1/2 as long as the spikelets, obtuse, 3-4-veined;

upper glumes nearly equaling the upper lemmas, 7-veined, acute;

lower lemmas exceeding the upper lemmas, 5-veined, apices involute;

lower paleas nearly equaling the lower lemmas in length and width;

upper lemmas obscurely transversely rugose, yellow, apiculate.

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

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

lower lemmas equaling the upper lemmas, 5-veined;

lower paleas nearly equaling the upper paleas in length and width;

upper lemmas transversely rugose;

upper paleas convex, ovate.

= 54.

= 54.