Flora of North America species comparison

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

100-200 cm, (3)4-10 mm thick near the base.

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, striate, margins hairy distally, apices with conspicuous tufts of hairs, hairs to 2 mm;

ligules 0.5-1.5 mm;

blades 10-50 cm long, (3)4-10(13) mm wide, flat, glabrous on both surfaces, margins whitish, 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.

all terminal, 25-75 cm long, 1-4 cm wide, spikelike, dense, usually included in the uppermost sheath;

lower nodes with 1-2(3) branches;

primary branches mostly 0.5-6 cm, appressed or spreading to 30° from the rachis, spikelet-bearing to the base;

secondary branches appressed;

pulvini glabrous;

pedicels 0.5-2 mm, appressed.

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

2.5-3.5(4) mm, whitish to plumbeous.

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, narrowly lanceolate, membranous, prominently keeled;

lower glumes 0.6-2 mm;

upper glumes 2-3.5(4) mm, subequal to the lemmas;

lemmas 2.5-3.5(4) mm, linear-lanceolate, membranous, glabrous, acute;

paleas 2.4-3.4(3.8) mm, linear-lanceolate, membranous, glabrous;

anthers 0.6-1 mm, yellowish.

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

0.8-1.7 mm, ellipsoid, light yellowish-brown, sometimes translucent.

= 24, 36, 54.

= 36.