Flora of North America species comparison

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

internodes glabrous, shiny below the nodes.

30-80 cm, slightly decumbent basally, erect above, not conspicuously branched, branches, when present, not geniculate and widely divergent;

internodes mostly glabrous, sometimes hirtellous 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.

shorter than the internodes, glabrous, margins whitish, rounded towards the base, not becoming spirally coiled when old;

ligules 4-7(10) mm, acuminate, lacerate;

blades 5-20(25) cm long, 0.2-1.2 mm wide, tightly involute, arcuate, scabrous abaxially, scabrous or 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.

8-20(25) cm long, 2-5 cm wide, loosely contracted;

primary branches 0.5-7 cm, capillary, diverging up to 70° from the rachises, naked basally;

pedicels 3-20 mm.

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

3.5-5 mm, stramineous to brown or purplish.

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, 1.5-2.5 mm, shorter than the florets, thin, hyaline, glabrous;

lower glumes veinless, truncate or obtuse, often toothed or notched;

upper glumes 1-veined or veinless, obtuse to acute, often mucronate, mucros shorter than 0.7 mm;

lemmas 3.5-5 mm, narrowly lanceolate, calluses hairy, hairs to 0.6 mm, lemma bodies glabrous, smooth, shiny, apices acuminate, awned, awns 10-30 mm, clearly demarcated from the lemma bodies, flexuous;

paleas 3.5-5 mm, narrowly lanceolate, glabrous, acuminate;

anthers 2-2.6 mm, greenish.

0.8-1 mm, fusiform, brownish.

2.4-3.2 mm, fusiform, brownish.

= 20, 22, 28.

= 40.