Flora of North America species comparison

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

10-50(60) cm tall, 0.7-1.2 mm thick.

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, occasionally glabrous, usually villous to tomentose along the margins and back, with soft, kinky hairs to 4 mm;

ligules 0.2-0.4 mm;

blades (0.6)1.5-6(7) cm long, 1-1.5 mm wide, involute, stiff, spreading at right angles to the culm, glabrous abaxially, scabridulous adaxially, margins smooth.

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.

3-10 cm long, (0.3)1-5(6) cm wide, longer than wide, ultimately open, subovate, lower portion often included in the uppermost sheath;

lower nodes with 1-2 branches;

primary branches 0.5-5 cm, appressed or spreading to 90° from the rachis;

secondary branches appressed or spreading, without spikelets on the lower 1/8 – 1/4;

pedicels 0.2-2 mm, appressed or spreading.

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

1.4-2.1 mm, purplish.

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;

upper glumes 1.3-2 mm, from slightly shorter than to subequal to the florets;

lemmas 1.4-2.1 mm, ovate, membranous, glabrous, acute;

paleas 1.4-2.1 mm, ovate, membranous;

anthers 0.7-1 mm, purplish.

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

0.7-1 mm, orangish to whitish.

= 24, 36, 54.

= 40.