Flora of North America species comparison

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

internodes glabrous, shiny below the nodes.

20-60 cm tall, 1-2 mm thick, erect, not rooting at the lower nodes;

internodes mostly glabrous or sparsely hispidulous, always hispidulous below the nodes.

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, laterally compressed, keeled, smooth or scabridulous, not becoming spirally coiled when old;

ligules 0.2-0.8 mm, membranous, truncate;

blades 2-22 cm long, 0.5-2.7(3.5) mm wide, flat to folded, smooth or scabridulous abaxially, strigose 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.

4-14 cm long, 0.1-0.8 cm wide, spikelike, not dense;

primary branches 0.4-3 cm, appressed;

pedicels 0.1-1.2(4) mm.

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

2.5-3.6 mm, dark green or plumbeous, occasionally with 2 florets.

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, 1.2-3 mm, about 3/4 as long as the spikelets, 1-veined, gradually acute to acuminate, occasionally mucronate, mucros to 0.3 mm;

lemmas 2.5-3.6 mm, lanceolate, sometimes mottled with greenish-black areas, with short, appressed hairs on the basal 1/2 - 3/4 of the midveins and margins, apices acuminate, sometimes mucronate, mucros to 0.6 mm;

paleas 2.4-3.6 mm, lanceolate, glabrous, acuminate;

anthers 1.2-1.8 mm, greenish.

0.8-1 mm, fusiform, brownish.

1.6-2.3 mm, fusiform, brownish.

= 20, 22, 28.

= 20.