Flora of North America species comparison

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

30-100(120) cm tall, 1-3 mm thick near the base, erect to decumbent.

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, smooth or scabridulous, margins sometimes ciliate distally, apices with tufts of hairs, hairs to 4 mm;

ligules 0.5-1 mm;

blades (2)5-24 cm long, 2-4(6) mm wide, ascending or strongly divergent, flat to 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.

10-30 cm long, 4-12 cm wide, longer than wide, open, subovate to oblong;

rachises drooping or nodding;

lower nodes with 1-2 branches;

primary branches 1-8(12) cm, flexible, diverging at least 70° from the rachis, often strongly reflexed to 130°, tangled with each other and with branches from adjacent panicles;

lower branches no longer than those in the middle, usually included in the uppermost sheath;

secondary branches widely spreading, without spikelets on the lower 1/8 – 1/2;

pulvini pubescent;

pedicels 0.3-3 mm, spreading, scabridulous.

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

1.8-2.5 mm, 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, ovate, membranous;

lower glumes 0.9-1.5 mm;

upper glumes 1.4-2.5 mm, subequal to the florets;

lemmas 1.4-2.5 mm, lanceolate to ovate, membranous, glabrous, acute;

paleas 1.4-2.4 mm, ovate, membranous;

anthers 0.4-0.7 mm, yellow.

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

0.6-1 mm, ellipsoid, light brownish to reddish-orange.

= 24, 36, 54.

= 36, 38.