Flora of North America species comparison

10-150 cm, erect, sometimes branching at the aerial nodes, glabrous, sometimes scabrous beneath the panicle;

nodes glabrous.

30-100 cm, erect;

nodes glabrous.

glabrous, margins ciliate;

ligules 0.2-0.5 mm, membranous, ciliate;

blades (10)30-60 cm long, 2-8(12) mm wide, flat to folded, glabrous, margins ciliate basally.

green or glaucous;

sheaths glabrous or pubescent, margins ciliate;

ligules 0.5-3 mm, membranous, ciliate;

blades 3-50 cm long, 2-13 mm wide, flat, glabrous or pubescent, margins ciliate or glabrous basally.

2-20 cm long, 4-35 mm wide, fully exerted from the sheaths, erect, green, brown, brown-purple, or dark purple;

rachises terete, scabrous.

all terminal, 6-20 cm long, 20-53 mm wide, fully exerted from the sheaths, erect, green to brown, deep purple, or stramineous to creamy-white;

rachises terete, with pubescent hairs.

2.5-5.6 mm, sessile, glabrous;

lower glumes 1-3 mm, 0-1-veined;

upper glumes 1.3-3.4 mm, about 1/2 as long as the spikelet, (0)1-3-veined;

lower florets staminate or sterile;

lower lemmas 2.5-5.3 mm, 3-7-veined;

lower paleas absent or 2.5-5 mm;

anthers absent or about 1.4 mm;

upper florets not disarticulating at maturity;

upper lemmas 2.2-5.4 mm, (3)5(6)-veined, margins glabrous;

anthers 1.4-2.7 mm.

5.5-8.4 mm, sessile or subsessile, glabrous;

pedicels to 0.1 mm;

lower glumes 0.2-1.4 mm, veinless;

upper glumes 2-4.9 mm, to 1/2 as long as the spikelet, 1-5-veined, acute to broadly acute;

lower florets sterile;

lower lemmas 4.9-8.1 mm, 7-9(10)-veined;

lower paleas absent;

upper lemmas 5.2-7.6 mm, 5-7-veined, acuminate;

anthers 3, 3-4.5 mm.

1.2-1.9 mm long, 0.4-1 mm wide, concealed by the lemma and palea at maturity.

11-37 per cm, disarticulating at maturity;

fascicle axes 0.2-1.5 cm, with 1-12 spikelets;

outer bristles 16-89, 0.3-11.7 mm, many exceeding the spikelets;

inner bristles 7-20, 3.8-13.8 mm, fused to 1/4 of their length, flattened, grooved, ciliate;

primary bristles 10.5-23 mm, long-ciliate, noticeably longer than the other bristles.

9-16 per cm;

fascicle axes 1.5-5.6 mm, with a stipelike base of 1-5.6 mm and 1(2) spikelet(s);

outer bristles 13-19, 0.8-15.6 mm;

inner bristles 7-10, 11.2-30 mm, scabrous;

primary bristles 26.7-35 mm, scabrous, usually not noticeably longer than the other bristles.

= 36, 45.

= 18.