Flora of North America species comparison

10-60(100) cm, decumbent-ascending, bases somewhat compressed-keeled;

internodes glabrous, shiny below the nodes.

40-120 cm, erect, not conspicuously branched;

internodes mostly smooth, sometimes scabridulous below the nodes.

glabrous, margins hyaline;

ligules 0.2-1 mm, firm, truncate, ciliate, without lateral lobes;

blades 2-7(11) cm long, 1-2.8(4) mm wide, flat, occasionally conduplicate, smooth or scabridulous abaxially, scabridulous adaxially, margins and midveins not conspicuously thickened, greenish, apices acute, not sharp.

longer than the internodes, smooth or scabridulous, rounded towards the base, not becoming spirally coiled when old;

ligules 2-8 mm, firm below, membranous distally, obtuse to acute;

blades 15-50 cm long, 0.3-1.5 mm wide, flat to involute, smooth or scabridulous abaxially, hirtellous adaxially.

6-21 cm long, 4-16 cm wide, broadly ovoid, open;

primary branches 3-12 cm, capillary, lower branches spreading 30-90° from the rachises, never appearing fascicled;

pedicels 3-14 mm, longer than the spikelets.

15-50 cm long, 1-7 cm wide, loosely contracted, not dense;

primary branches 1-8 cm, appressed or diverging up to 30° from the rachises, naked basally;

pedicels 1.3-8 mm, hispidulous.

1.2-2.1 mm, occasionally with 2 or 3 florets.

3-4.2 mm.

equal, 0.6-1.7 mm, purplish, scabridulous, particularly on the veins, 1-veined, apices acute;

lemmas 1.2-2.1 mm, lanceolate to oblong-elliptic, somewhat plumbeous, glabrous, usually smooth, occasionally scabridulous near the apices, apices acute, unawned or mucronate, mucros to 0.3 mm;

paleas 1.2-2.1 mm, lanceolate, glabrous, acute;

anthers 1-1.3 mm, greenish-yellow to purplish at maturity.

subequal, 2-3 mm, exceeded by the florets, glabrous below, minutely pubescent or scabridulous distally, 1-veined, acuminate to acute, unawned or awned, awns to 1.6 mm;

lemmas 2.8-4.2 mm, narrow, lanceolate, calluses hairy, hairs to 1 mm, lemma bodies glabrous and smooth below, scabridulous distally, apices acuminate, awned, awns 8-40 mm, straight to flexuous, demarcation of the awns from the lemma bodies not evident;

paleas 2.8-4.2 mm, narrowly lanceolate, glabrous, acuminate;

anthers 1.4-2.2 mm, yellow.

0.8-1 mm, fusiform, brownish.

2-2.2 mm, fusiform, brownish.

= 20, 22, 28.

= unknown.