Flora of North America species comparison

10-45(70) cm, geniculate, often rooting at the lower nodes, glabrous or puberulent below the nodes;

internodes often smooth, shiny, glabrous.

40-110 cm tall, 1-2 mm thick, erect;

internodes puberulent for most of their length, strigose below the nodes.

shorter than the internodes, glabrous for most of their length, margins shortly (0.3-1.2 mm) pubescent distally, not becoming spirally coiled when old;

ligules 0.2-0.5 mm, truncate, erose, ciliate;

blades (1)3-10 cm long, 1-4.5 mm wide, flat, smooth or scabridulous.

glabrous and smooth for most of their length, scabridulous distally, margins hyaline;

ligules 1-2.5 mm, membranous, truncate, lacerate-ciliolate;

blades 5-18 cm long, 3-7 mm wide, flat, scabrous to scabridulous, occasionally smooth.

3-15 cm long, 1-1.6 cm wide, contracted, often interrupted below;

branches 0.4-5.5 cm, appressed or diverging up to 30° from the rachises, spikelet-bearing to the base;

pedicels 0.1-4 mm, scabrous to hirsute;

disarticulation above the glumes.

terminal and axillary, 6-21 cm long, 0.2-1 cm wide, narrow, not dense;

axillary panicles usually exserted at maturity;

branches 0.8-6 cm, ascending to closely appressed;

pedicels 0.8-3.5 mm, strigose.

1.8-2.8 mm, borne singly.

2.2-3.7 mm.

unequal, shorter than the florets, thin and membranous throughout, unawned;

lower glumes lacking or rudimentary, veinless, rounded and often erose;

upper glumes 0.1-0.3 mm, veinless;

lemmas 1.8-2.8 mm, oblong-elliptic, mostly scabrous, calluses hairy, hairs to 0.8 mm, veins greenish, lower 1/4 of the midveins with a few appressed hairs, apices acute to acuminate, awned, awns 1.5-5 mm, straight;

paleas 1.8-2.8 mm, oblong-elliptic, acute to acuminate;

anthers 0.2-0.5 mm, yellow.

subequal, 1.8-3 mm, nearly as long as the lemmas, 1-veined, tapering from near the base, apices scabridulous, acuminate, unawned or awned, awns to 1 mm;

lemmas 2.2-3.7 mm, lanceolate to narrowly lanceolate, hairy on the calluses, lower 1/2 of the midveins, and margins, hairs 0.2-0.5 mm, apices scabridulous, acuminate, awned, awns 5-18 mm, purplish;

paleas 2-3.5 mm, lanceolate, proximal 1/2 shortly pilose, apices scabridulous, acuminate;

anthers 0.4-0.8 mm, yellow.

1-1.4 mm, fusiform, brownish.

1.4-2 mm, fusiform, brown.

= 40, 42.

= 40.