Flora of North America species comparison

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

25-95 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, upper margins sometimes sparsely hispid-ciliate, apices hairy, hairs to 5 mm;

ligules 0.2-0.3 mm;

blades 8-22 cm long, 2-5 mm wide, flat or involute, glabrous abaxially, scabridulous adaxially, margins scabrous, sometimes sparsely hispid.

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.

5-30 cm long, 0.4-1.6 cm wide, narrow, contracted;

lower nodes with 3 or 5 branches;

primary branches 0.3-2 cm, appressed or spreading to 20° from the rachis, spikelet-bearing to near the base;

secondary branches appressed;

pedicels 0.2-2.5 mm, appressed, scabridulous.

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

2.8-3.8 mm, purplish-red.

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 lanceolate or ovate, hyaline to membranous;

lower glumes 0.9-3 mm;

upper glumes 2.9-3.8 mm, subequal to the florets;

lemmas 2.9-3.8 mm, ovate, membranous, glabrous, acute;

paleas 2.9-3.8 mm, ovate, membranous;

anthers 1.5-2 mm, yellowish to purplish.

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

1.8-2.3 mm, ellipsoid, somewhat laterally flattened, rugulose, reddish-brown.

= 24, 36, 54.

= 60.