Flora of North America species comparison

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

internodes glabrous, shiny below the nodes.

10-50 cm tall, 0.4-1 mm thick, decumbent;

internodes glabrous or strigulose.

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, strigulose or glabrous, usually without necrotic spots, not becoming spirally coiled when old;

ligules 1-2 mm, membranous throughout, obtuse, strigulose or glabrous, erose or toothed, with lateral lobes, lobes less than 1.5 mm longer than the central portion;

blades 1-6 cm long, 1-2 mm wide, flat to involute, smooth or scabridulous abaxially, hirsute adaxially, usually without necrotic spots.

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.

4-13 cm long, 1-3(5) cm wide, not dense;

primary branches 0.5-4 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.

3.5-5 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, 2-4 mm, exceeded by the florets, 1-veined, scabrous on the veins and near the apices, apices acuminate, unawned or awned, awns to 1.2 mm;

lemmas 3.5-5 mm, lanceolate, mostly purplish, veins conspicuously green, pubescent on the lower 1/3-1/2 of the midveins and margins, hairs to 1.5 mm, apices scabridulous, acuminate, awned, awns 4-12(20) mm, flexuous;

paleas 3.5-5 mm, narrow-lanceolate, intercostal region pubescent, apices acuminate, veins sometimes extending into awns to 0.5 mm;

anthers 1.3-3 mm, purple.

0.8-1 mm, fusiform, brownish.

2-2.3 mm, fusiform, brownish.

= 20, 22, 28.

= unknown.