Flora of North America species comparison

15-90 cm tall, 0.7-1 mm thick, glabrous, pubescent, or tomentose;

nodes 3-4.

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

nodes 1-2.

7-21 cm long, about 1 cm wide;

branches straight, strongly ascending to appressed, longest branches 4-5 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, 7-11.5 mm;

lower glumes 0.9-1.1 mm wide, 4-5-veined;

upper glumes 3-veined;

florets 5.5-7 mm long, 0.8-1.3 mm thick, fusiform, somewhat laterally compressed;

calluses 0.4-1.2 mm, blunt;

lemmas coriaceous, evenly pubescent, hairs 0.4-1 mm, apices 1-lobed, lobe about 0.1 mm long, thick, stiff, apical lemma hairs 0.4-0.8 mm;

awns 16-30 mm, persistent, (once)twice-geniculate, all segments scabrous, terminal segment straight;

paleas 4.5-6.5 mm, from 3/4 as long as to equaling the lemmas, sparsely to moderately pubescent, hairs not exceeding the apices, veins terminating below the apices, apices flat or pinched;

anthers 2.3-3.5 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.

4-5 mm, fusiform.

2.5-4 mm.

sheaths glabrous, pubescent, or tomentose;

collars, including the sides, glabrous or sparsely pubescent, hairs shorter than 0.5 mm;

basal ligules 0.5-1.2 mm, hyaline, glabrous, truncate to acute;

upper ligules to 2.5 mm;

basal blades 0.5-1.5 mm wide, folded to convolute, abaxial surfaces smooth, glabrous, adaxial surfaces prominently ribbed, often with 0.3-0.5 mm hairs, sometimes glabrous;

upper blades to 2.5 mm wide, otherwise similar to the basal blades.

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.

= 34.

= 34.