Flora of North America species comparison

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

internodes glabrous, shiny below the nodes.

5-30(40) cm, erect, rounded near the base;

internodes smooth or scabridulous.

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.

longer than the lower internodes, glabrous, becoming flattened and papery or ribbonlike at maturity;

ligules 2-4(5) mm, membranous, acute;

blades 2-6 cm long, 0.4-1.6 mm wide, tightly involute, filiform, stiff, scabrous abaxially, sparsely hirtellous adaxially, apices sharp.

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.

1.5-7 cm long, 0.4-2 cm wide, contracted, sometimes dense;

primary branches 0.1-2.8 cm, mostly tightly appressed or diverging up to 30° from the rachises;

pedicels 0.1-2 mm, scabrous.

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

2.2-3.5 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, 0.8-2.5 mm, scabridulous distally;

lower glumes 1-veined, awned, awns to 1.6 mm;

upper glumes usually 3-veined, apices truncate to acute, 3-toothed, teeth sometimes shortly awned, awns to 0.6 mm;

lemmas 2.2-3.5 mm, lanceolate, yellowish mottled with dark green, sparsely appressed-pubescent on the lower portion of the midveins and margins, hairs to 0.4 mm, apices scabridulous, acute to acuminate, awned, awns 1-5 mm, straight or flexuous;

paleas 2.2-3.5 mm, lanceolate, acute to acuminate;

anthers 1.5-2 mm, purplish.

0.8-1 mm, fusiform, brownish.

1.3-1.6 mm, fusiform, brownish.

= 20, 22, 28.

= unknown.