Flora of North America species comparison

7-35(60) cm, erect or decumbent.

20-100 cm.

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

ligules 0.3-1 mm;

blades 2-12(20) cm long, 2-6 mm wide, flat, abaxial surface glabrous, adaxial surface scabridulous, sometimes sparsely hispid, margins ciliate-pectinate.

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.

4-15(18) cm long, 0.3-6 cm wide, open (contracted when immature), pyramidal;

lower nodes with 7-12(15) branches;

primary branches 0.5-4.5 cm, spreading 30-90° from the rachis, with elongated glands, without spikelets on the lower 1/3 – 1/2, secondary branches appressed;

pedicels 0.1-0.5 mm, appressed.

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.

1.2-1.8 mm, plumbeous or brownish, often secund along the branch.

1.6-2 mm, yellowish-green to grayish.

unequal, ovate to obovate, membranous;

lower glumes 0.3-0.7 mm, without midveins;

upper glumes 1.2-1.8 mm, at least 2/3 as long as the florets, often longer;

lemmas 1.2-1.7 mm, ovate to elliptic, membranous, glabrous, acute;

paleas 1.1-1.6 mm, ovate to elliptic, membranous, glabrous;

anthers 0.2-0.4 mm, yellowish or purplish.

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.

0.6-1 mm, obovoid, faintly striate, light brownish.

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

= 24, 36, 54.

= unknown.