Flora of North America species comparison

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

nodes usually 3.

15-90 cm tall, 0.5-0.8 mm thick, usually glabrous, sometimes puberulent to 5 mm below the lower nodes;

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.

7-19 cm long, 0.5-1 cm wide;

branches straight, appressed to strongly ascending, longest branches 1.2-2.5 cm.

pendulous.

appressed to the branches.

6.5-9 mm, subequal;

lower glumes 1(3)-veined;

upper glumes to 0.5 mm shorter than the lower glumes, 0.6-1 mm wide, 1-veined;

florets 4.5-6 mm long, 0.8-1 mm thick, fusiform, teret, widest below midlength;

calluses 0.4-1 mm, blunt;

lemmas evenly hairy, hairs at midlength about 0.5 mm, apical hairs 0.7-1.5(2) mm, apical lobes 0.3-0.8, membranous, flexible;

awns 12-25 mm, persistent, twice-geniculate, scabrous, terminal segment straight;

paleas 3-4 mm, 3/4 - 4/5(9/10) as long as the lemmas, veins terminating at or before the apices, apices round, flat, apical hairs 0.5-1 mm, extending beyond the palea body;

anthers 1.5-2 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.

about 4 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 smooth, glabrous, margins not ciliate;

collars, including the sides, glabrous or sparsely pubescent, collars of the flag leaves glabrous;

ligules 0.2-1.5(2) mm, without tufts of hair on the sides, truncate to rounded;

blades 0.5-2, wide, abaxial surfaces smooth to scabridulous, adaxial surfaces scabrous or puberulent.

= 44.

= 32.