Flora of North America species comparison

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

internodes glabrous, shiny below the nodes.

30-100 cm tall, 1-2 mm thick, herbaceous;

internodes smooth, shiny, usually glabrous throughout.

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, usually smooth, occasionally scabridulous distally;

ligules 0.2-0.6 mm, membranous, truncate, ciliolate;

blades 5-15 cm long, 2-7 mm wide, flat, glabrous abaxially, glabrous, smooth or scabridulous adaxially, those of the lateral branches often shorter and narrower than those of the primary branches.

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.

terminal and axillary, 4-15 cm long, 0.1-0.7 cm wide, narrow, not dense;

axillary panicles common, partly included in the sheaths;

branches 0.5-4 cm, ascending to appressed;

pedicels 1-4 mm, glabrous.

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

2.6-3.3 mm, not imbricate along the branches.

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, 1.4-2 mm, about 1/3–2/3 as long as the lemmas, smooth or scabridulous distally, l(2)-veined, acuminate or acute, unawned or awned, awns to 1 mm;

lemmas 2.6-3.3 mm, narrowly lanceolate, usually hairy on the calluses and lower 1/3 of the margins and midveins (rarely glabrous), hairs 0.5-1 mm, apices scabridulous, acuminate, unawned or awned, awns 0.5-7 mm;

paleas 2.2-3.1 mm, shorter than the lemmas, narrowly lanceolate, intercostal region shortly pilose on the basal 1/3, apices acuminate;

anthers 0.3-0.6 mm, yellow.

0.8-1 mm, fusiform, brownish.

1.5-1.8 mm, fusiform, brown.

= 20, 22, 28.

= 40.