Flora of North America species comparison

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

internodes glabrous, shiny below the nodes.

10-33 cm, erect or decumbent, sometimes rooting at the lower nodes;

internodes glabrous.

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.

usually longer than the internodes, glabrous, margins sparsely hairy distally, hairs to 1 mm, coarse;

ligules 0.3-0.9 mm, membranous, truncate, ciliate;

blades 1-6 cm long, 0.6-2 mm wide, flat to loosely involute, appressed-pubescent to sparsely pilose.

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.

4-12 cm long, 0.5-2.6(4) cm wide;

primary branches 2-3.5 cm, appressed or diverging up to 70° from the rachises;

pedicels 1-3 mm, glabrous, appressed;

disarticulation above the glumes.

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

2.5-5 mm, borne singly.

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.

glabrous, 1-veined, acute to acuminate, unawned or awned, awns to 1.5 mm;

lower glumes 0.8-1.7 mm, entire;

upper glumes 1-2(3) mm;

lemmas (2.5)3-4.5(5) mm, subulate to lanceolate, calluses appressed-pubescent, lemma bodies appearing 5-veined (the intermediate "veins" are actually rows of short barbs on top of folded epidermal ridges), lateral veins occasionally ciliate, apices acuminate, awned, awns 10-32 mm, slender, flexuous;

paleas 2.4-4.4 mm, narrowly lanceolate, glabrous, acuminate;

anthers 0.3-0.6 mm, yellowish.

0.8-1 mm, fusiform, brownish.

0.6-3.1 mm, narrowly fusiform, light brownish.

= 20, 22, 28.

= 20.