Flora of North America species comparison

3-45 cm, decumbent, highly branching;

nodes glabrous.

50-200 cm, erect, pubescent beneath the panicle;

nodes pubescent.

glabrous or pubescent;

ligules 1.3-2.2 mm;

blades 1-15 cm long, 1-6 mm wide, flat or folded, glabrous or pubescent.

green or glaucous;

sheaths antrorsely scabridulous, mostly glabrous, margins ciliate;

ligules 1-1.7 mm;

blades 25-50 cm long, 3-9 mm wide, flat, antrorsely scabridulous, glabrous or pubescent, margins ciliate or glabrous basally, midvein not noticeably thickened.

2-2.7 cm, axillary, concealed in the sheaths;

rachises flat, glabrous or scabrous.

11.5-37.3 cm long, 35-50 mm wide, fully exerted from the sheaths, erect to slightly arching, white (sometimes purplish-tinged);

rachises terete, pubescent.

10-22 mm, sessile or pedicellate, pedicels to 0.2 mm;

lower glumes usually absent, sometimes to 0.5 mm, veinless;

upper glumes 0-1.3(3.5) mm, veinless;

lower florets sterile;

lower lemmas 10-22 mm, 9-13-veined;

lower paleas usually absent;

upper lemmas 10-22 mm, 8-12-veined;

upper paleas 2-7-veined;

anthers 4.7-7 mm, long-exserted from the florets at anthesis.

5.6-6.7 mm;

pedicels 0.1-0.2 mm;

lower glumes 1-2.2 mm, veinless;

upper glumes 3.1-5.5 mm, 1-3-veined;

lower florets staminate;

lower lemmas 5.2-6.5 mm, 4-6-veined;

lower paleas 3.8-5 mm;

anthers 2.3-3 mm;

upper florets not disarticulating at maturity;

upper lemmas 5.2-6.2 mm, margins glabrous, 5-veined;

upper paleas bifid, teeth 0.3-0.8 mm;

anthers 1.9-2.9 mm.

concealed by the lemma and palea at maturity.

1-6;

axes to 0.5 mm, with 1-2 spikelets;

outer and inner bristles alike, 6-15, 0.5-10.9 mm;

primary bristles 10-14 mm, usually not noticeably longer than the other bristles.

5-12 per cm;

fascicle axes 1-6 mm, with 1-10 spikelets;

outer bristles 0-24, 0.8-9.6 mm, terete, scabrous;

inner bristles 6-20, 5.6-17.5 mm, ciliate;

primary bristles 12.2-23.8 mm, ciliate, noticeably longer than the other bristles.

= 36.

= 18, 27, 36, 45, 54.