Flora of North America species comparison

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

internodes glabrous, shiny below the nodes.

25-80 cm, erect, wiry;

internodes mostly glabrous, strigose or glabrous 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.

scabridulous, not becoming spirally coiled when old;

ligules 1-3 mm, membranous, acuminate, deeply lacerate;

blades 2-12 cm long, 1-3 mm wide, flat to involute, scabridulous abaxially, hirtellous or scabrous 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.

4-18(20) cm long, 0.2-2.8 cm wide, contracted, not dense, sometimes interrupted below;

panicle branches 0.6-5 cm, appressed or diverging up to 30° from the rachises, spikelet-bearing to the base;

pedicels 0.1-3 mm.

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

3-4 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.

unequal, 0.3-1 mm, shorter than the florets, 1-veined, unawned;

lower glumes shorter than the upper glumes, obtuse to acute, sometimes erose;

lemmas 2.8-4 mm, narrowly lanceolate, purplish, scabrous, sparsely appressed-pubescent on the calluses and lower 1/4 of the midveins and margins, hairs shorter than 0.3 mm, apices acuminate, awned, awns (10)20-40 mm;

paleas 2.6-3.9 mm, narrowly lanceolate, intercostal region sparsely pubescent on the basal 1/3, apices acuminate, scabrous;

anthers 0.9-1.6 mm, purplish.

0.8-1 mm, fusiform, brownish.

2-2.6 mm, fusiform, brownish.

= 20, 22, 28.

= 40.