Flora of North America species comparison

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

internodes glabrous, shiny below the nodes.

25-70 cm, erect, rounded near the base;

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.

glabrous, stiff, becoming flattened, ribbonlike or papery, and conspicuously spirally coiled when old;

ligules (6)10-20 mm, hyaline, acuminate, lacerate;

blades 7-25 cm long, 1-4 mm wide, flat to involute, scabrous abaxially, spiculate 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.

8-25 cm long, 0.5-3 cm wide, not dense;

primary branches 0.6-8 cm, appressed or diverging up to 30° from the rachises;

pedicels 0.2-5 mm, scabrous.

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

3.5-7 mm, yellowish to pale greenish.

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.

(3)3.5-6(7) mm, scabridulous, unawned or awn-tipped;

lower glumes shorter than the upper glumes, 1-veined;

upper glumes equaling or exceeding the florets, 3-veined, acuminate to acute, occasionally 3-toothed, awned, awns to 1.5 mm;

lemmas 3.5-5.5(6) mm, lanceolate, pubescent on the lower 1/2 of the midveins and margins, hairs to 1 mm, apices scabrous, acuminate, awned, awns 12-27 mm, flexuous;

paleas 3.5-5.5 mm, lanceolate, pilose between the veins, apices scabridulous, acuminate;

anthers 2-3.5 mm, purple.

0.8-1 mm, fusiform, brownish.

1.9-2 mm, fusiform, light brown.

= 20, 22, 28.

= unknown.