Flora of North America species comparison

30-100 cm tall, 1-1.5 mm thick, glabrous;

nodes usually 3.

12-35 cm tall, 0.4-0.7 mm thick, smooth or antrorsely scabridulous;

nodes 2-3.

7-25 cm long, 7-15 cm wide;

branches divergent, flexuous, longest branches 7-10 cm, with the spikelets confined to the distal 1/4.

2.5-7 cm long, 0.5-2 cm wide, contracted;

branches appressed, longest branches 1-2 cm.

pendulous.

subequal, 6-10 mm long, 0.6-0.9 mm wide, lanceolate, not saccate;

florets 4.5-6 mm long, 0.7-1 mm thick, fusiform, terete;

calluses 0.3-0.8 mm, blunt;

lemmas evenly and densely pilose, hairs 2.5-3.5 mm, apical lobes 0.6-1.9 mm, membranous;

awns 4-11 mm, readily deciduous, straight to once-geniculate, scabrous;

paleas 4-5.6 mm, from as long as to slightly longer than the lemmas;

anthers 1.6-2 mm, dehiscent, not penicillate.

7.5-11 mm long, 0.9-1.2 mm wide;

upper glumes 2-3 mm shorter;

florets 5-6 mm long, 0.6-0.9 mm thick, fusiform, terete;

calluses 0.4-0.7 mm, blunt;

lemmas evenly hairy on the lower portion, often glabrate distally, body and apical hairs 0.2-0.5 mm, apical lobes not or scarcely developed, to 0.1 mm;

awns 15-25 mm, persistent, twice-geniculate, first 2 segments strigulose, hairs about 0.1 mm, terminal segment straight;

paleas 2.2-3.6 mm, 1/2 - 3/5 as long as the lemmas, pubescent, hairs not exceeding the apices, apices rounded;

anthers 2.5-3 mm, dehiscent, penicillate, hairs 0.1-0.5 mm.

3-4 mm, fusiform.

3.5-4.5 mm, fusiform.

sheaths glabrous, margins ciliolate;

collars glabrous, without tufts of hair on the sides;

ligules 0.1-0.5 mm, truncate, ciliolate;

blades 0.8-3 mm wide, convolute when dry, abaxial surfaces scabridulous, adaxial surfaces glabrous.

sheaths glabrous, smooth or scabridulous;

collars glabrous, without tufts ' of hair on the sides;

basal ligules 0.1-1 mm, truncate to rounded;

upper ligules 1-2 mm, acute;

blades 0.5-1.5 mm wide when flat, usually folded to involute and about 0.5 mm in diameter, stiff, abaxial surfaces smooth or scabrous, adaxial surfaces scabrous.

= 44.

= 32.