Flora of North America species comparison

14-120(180) cm tall, 0.3-2 mm thick, internodes glabrous or puberulent to densely pubescent;

nodes 2-4, glabrous or pubescent.

10-35 cm tall, 0.3-0.9 mm thick, pubescent below the nodes, glabrous or sparsely puberulent elsewhere;

nodes 1-2.

5-30 cm long, 0.5-1.5 cm wide;

branches appressed, straight, longest branches 1-7 cm.

4-12 cm long, 2-5 cm wide, erect;

branches and pedicels straight, appressed to strongly ascending, longest branches 2-7 cm.

appressed to the branches.

subequal, 9-15 mm long, 0.6-0.9 mm wide;

florets 5.5-7.5 mm long, 0.5-0.9 mm thick, fusiform, terete;

calluses 0.8-1.2 mm, sharp, dorsal boundary of the glabrous tip with the callus hairs narrowly acute;

lemmas evenly hair, hairs 0.5-1.5 mm at midlength, apical hairs somewhat longer than those below, sometimes similar in length to those at the base of the awns, sometimes longer, apical lobes 0.3-0.5 mm, membranous;

awns 15-55 mm, twice-geniculate, first 2 segments evidently hairy, terminal segment glabrous or partly to wholly pilose, sometimes scabrous;

paleas 2.2-3.5 mm, 2/5 – 3/5 as long as the lemmas, hairs at the tip usually shorter than 1 mm, frequently extending beyond the apices, apices rounded;

anthers 2.5-3.5 mm, dehiscent, not penicillate.

subequal, 3.5-5.5 mm long, 1-1.5 mm wide, 5-veined;

lower glumes obtuse, apices rounded to acute;

upper glumes rounded to obtuse, subequal or to 1 mm shorter than the lower glumes;

florets 3.5-4.5 mm long, 1-1.5 mm wide, fusiform, laterally compressed;

calluses 0.3-0.5 mm, blunt;

lemmas coriaceous, glabrous, shiny, apical lobes about 0.2 mm long, thick;

awns 6-10 mm, readily deciduous, not geniculate, scabrous;

paleas about 3 mm, from3/4 as long as to equaling the lemmas, indurate, glabrous, apices rounded, flat;

anthers about 2.5 mm, dehiscent, penicillate.

4-6 mm, fusiform.

2.5-4 mm.

sheaths glabrous or puberulent to densely pubescent, often ciliate at the throat;

collars often with tufts of hair at the sides;

ligules 0.2-1.5 mm, often ciliate;

blades 0.5-3 mm wide and flat, or convolute and 0.1-0.8 mm in diameter, lax to straight.

sheaths completely or mostly glabrous, margins sometimes ciliate distally;

collars glabrous;

ligules 0.4-1 mm, hyaline, glabrous or pubescent, rounded;

blades tightly folded or convolute, to 1 mm wide or thick, abaxial surfaces scabrous, adaxial surfaces pubescent.

=36.

= 34.