Flora of North America species comparison

10-80 cm, often geniculate at the base, much branched near the base;

internodes mostly scabridulous or smooth, always scabridulous below the nodes.

3-27 cm, erect, glabrous.

often shorter than the internodes, glabrous, smooth or scabridulous;

ligules 1-2 mm, membranous to hyaline, truncate to obtuse;

blades 3-8.5(10) cm long, 1-2.5 mm wide, flat or loosely involute, scabrous abaxially, strigulose adaxially.

usually longer than the internodes, smooth or scabridulous;

ligules 1.5-3 mm, membra nous, acute;

blades 1-5 cm long, 0.6-1.5 mm wide, flat to involute, smooth or scabridulous abaxially, sometimes shortly pubescent adaxially.

6.5-13.5 cm long, 1-6.5 cm wide, not dense, often purplish;

branches 1.6-4 cm, ascending or diverging up to 80° from the rachises, spikelet-bearing to the base;

pedicels 2-6 mm, appressed to divaricate, antrorsely scabrous;

disarticulation above the glumes.

2-8 cm long, 0.3-3.4 cm wide, contracted or open;

primary branches 1-5 cm, diverging up to 80° from the rachises;

pedicels 0.4-5 mm, smooth or scabrous.

2.5-5.5 mm, borne singly.

1.4-4.2 mm.

0.4-1.3 mm, exceeded by the florets, 1-veined, obtuse, often minutely erose;

lower glumes 0.4-1 mm;

upper glumes 0.6-1.3 mm;

lemmas 2.5-3.8(5.3) mm, narrowly lanceolate, mostly smooth, scabridulous distally, hairy on the calluses, lower 1/2 of the margins, and midveins, hairs 0.2-0.5 mm, apices acuminate, awned, awns 10-30 mm, straight to flexuous;

paleas 2.2-4.8 mm, narrowly lanceolate, acuminate;

anthers 0.3-1.2 mm, purplish.

smooth or scabridulous;

lower glumes 0.8-2.8 mm, narrow to broadly lanceolate, 1-veined, acute, often awn-tipped;

upper glumes 0.9-3 mm, wider than the lower glumes, lanceolate, (1)2-3-veined, truncate to acute, 2- or 3-toothed;

lemmas 1.4-4.2 mm, widest near the base, purplish mottled with dark green, hairy on the calluses and lower M of the lemma bodies, hairs to 0.5 mm, apices acuminate, usually bifid and awned from between the teeth, teeth to 0.5 mm, awns 3-10 mm, flexuous, purplish;

paleas 1.3-3.8 mm, narrowly lanceolate, acuminate to subacute;

anthers 0.5-1 mm, purplish to yellowish.

1.7-2.5 mm, fusiform, reddish-brown.

1-1.6 mm, fusiform, brownish.

panicles with 1-3 spikelets present in the axils of the lower leaves.

= 20, 40, 60.

= 30.