Flora of North America species comparison

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

nodes glabrous.

16-75 cm, erect;

nodes glabrous.

glabrous, margins ciliate;

ligules 1-1.3 mm;

blades 5-40 cm long, 2-4.5 mm wide, flat to folded, glabrous, pubescent, or scabrous, margins ciliate or glabrous 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.

terminal, 4-11.5 cm long, 50-75 mm wide, fully exerted from the sheaths, erect, white;

rachises terete, pubescent (basally).

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.

9-12 mm, glabrous;

pedicels 0.1-0.4 mm;

lower glumes 0.3-1.3 mm, veinless;

upper glumes 2.5-5.2 mm, 1(3)-veined;

lower florets staminate or sterile;

lower lemmas 7.5-10.5 mm, 7-9(10)-veined;

lower paleas absent or 5.5-8.5 mm;

anthers absent or 3.8-4.5 mm;

upper lemmas 9-11 mm, 7-veined, apices scabridulous;

anthers 3.5-5 mm.

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

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.

7-11 per cm;

fascicle axes 1.5-2.5 mm, with 1-4 spikelets;

outer bristles (0)1-8, 1-13.5 mm;

inner bristles 23-41, 13-50.5 mm, densely plumose;

primary bristles 40-50 mm, ciliate, usually not noticeably longer than the other bristles.

= 36, 45.

= 45.