Flora of North America species comparison

20-100 cm.

40-100 cm.

rounded below, distal margins and apices hairy, hairs to 3 mm;

ligules 0.2-1.2 mm;

blades 5-20 cm long, 3-8 mm wide, flat to loosely involute, glabrous abaxially, scabridulous adaxially, margins scabridulous.

keeled or rounded, glabrous, apices ciliate;

ligules 0.2-0.4 mm;

blades 10-40 cm long, 2-4 mm wide, flat but soon becoming involute, tapering to a fine point.

10-25(35) cm long, 1-5 cm wide, usually some-what contracted, sometimes spikelike, often interrupted below;

primary branches 0.7-7 cm, appressed or spreading to 30° from the rachis, spikelet-bearing to the base;

secondary branches appressed;

pedicels 0.2-1.4 mm, appressed.

14-35 cm long, 0.4-3 cm wide, contracted, interrupted, and rather lax;

primary branches appressed to strongly ascending, spikelet-bearing to the base, lower branches 1.5-5 cm, much longer than the adjacent internodes;

pedicels 0.1-1.2(1.8) mm.

1.6-2 mm, yellowish-green to grayish.

1.4-1.8(2) mm, plumbeous to greenish.

unequal, linear-lanceolate to ovate, membranous;

lower glumes 0.5-1.1 mm, usually without veins;

upper glumes 1.1-2 mm, subequal to the lemmas;

lemmas 1.1-2 mm, ovate, membranous, glabrous (occasionally minutely pubescent), acute;

paleas 1-2 mm, ovate, membranous;

anthers 2 or 3, 0.5-1 mm, yellowish or purplish.

0.3-0.5 mm, obtuse;

upper glumes 0.4-0.7 mm, usually less than M as long as the florets, faintly 1-veined, truncate, erose to denticulate;

lemmas 1.4-2 mm, elliptic, glabrous, 1-veined, acute;

paleas 1.4-2 mm, elliptic;

anthers 3(2), 0.9-1.1 mm.

0.7-1.1 mm, ellipsoid, laterally flattened, light brownish.

0.7-1 mm, quadrangular, laterally compressed, reddish-brown, truncate.

= unknown.

= 24.