Flora of North America species comparison

3-45 cm, decumbent, highly branching;

nodes glabrous.

30-200 cm, erect, branching;

nodes glabrous.

glabrous or pubescent;

ligules 1.3-2.2 mm;

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

glabrous, margins ciliate;

ligules 1.5-2.7 mm;

blades 15-55 cm long, 4-18 mm wide, flat, glabrous or pubescent.

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

rachises flat, glabrous or scabrous.

terminal, 10-25 cm long, 15-30 mm wide, fully exerted from the sheaths, erect to drooping, white, yellow, light brown, or pink to deep purple;

rachises terete, scabrous.

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.

3-4.5 mm, sessile;

lower glumes absent or to 2 mm, veinless;

upper glumes 3-4.5 mm, glabrous, 5-7-veined, 3-lobed;

lower florets sterile or staminate;

lower lemmas 3-3.9 mm, 5-7-veined, apices lobed;

lower paleas 2.9-3.7 mm;

anthers absent or 1.7-2 mm;

upper florets disarticulating at maturity;

upper lemmas 1.7-3 mm, coriaceous, shiny, 5-veined, apices ciliate;

anthers 1.3-2.1 mm.

about 1.7 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.

33-45 per cm, disarticulating at maturity;

fascicles axes 0.2-0.5 mm, with 1 spikelet;

outer bristles 13-30, 1.3-5 mm, scabrous;

inner bristles 6-14, 4.3-11.5 mm, long ciliate;

primary bristles 14-25 mm, long-ciliate, noticeably longer than the other bristles.

= 36.

= 18, 36, 45, 48, 52, 53, 54, 56, 78.