Flora of North America species comparison

30-100 (120) cm.

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

usually keeled below, glabrous;

ligules 0.2-0.5 mm;

blades (6)10-30(50) cm long, 1-5 mm wide, flat, glabrous on both surfaces.

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.

20-35(50) cm long, 0.3-2.2(3) cm wide, contracted, narrow, sometimes included in the uppermost sheath;

primary branches 0.4-2.5(5) cm, appressed or spreading to 40° from the rachis, as long or longer than the adjacent internodes;

secondary branches appressed, spikelet-bearing to near the base;

pulvini glabrous;

pedicels 0.1-1.8 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.

2-2.6(2.7) mm, plumbeous to light brownish.

1.8-2.5 mm, plumbeous.

subequal, ovate or obovate, membranous;

lower glumes 0.5-1 mm, often without midveins;

upper glumes 0.8-1.6 mm, 1/2 - 2/3 as long as the florets, acute to obtuse, entire;

lemmas 1.8-2.6(2.7) mm, ovate, membranous, glabrous, acute or obtuse;

paleas 1.9-2.4 mm, ovate, membranous, glabrous;

anthers 3, 0.5-1.1 mm, white, sometimes purple-tinged.

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.

1-1.2 mm, quadrangular, laterally compressed, reddish-brown, truncate.

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

= 18, 24, 36.

= 36, 38.