Flora of North America species comparison

50-300 cm, erect, branching;

nodes glabrous.

5-100 cm, erect, sometimes branching, mostly glabrous but sometimes scabrous beneath the panicle;

nodes glabrous.

glabrous or pubescent, with or without ciliate margins;

ligules 2-5 mm;

blades 15-100 cm long, 7-70 mm wide, flat, glabrous or pubescent.

green;

sheaths glabrous or pubescent, margins ciliate;

ligules 0.6-1.2 mm, membranous, ciliate;

blades 2-45 cm long, 2.5-7 mm wide, flat, glabrous or pubescent, margins ciliate or glabrous basally.

terminal, 4-200 cm long, 2-70 mm wide, fully exerted from the sheaths, erect;

rachises terete, densely pubescent.

2-13.8 cm long, 4-11 mm wide, erect, green or dark purple;

rachises terete, scabrous.

3-7 mm;

pedicels 0.6-1.8 mm;

lower glumes absent or to 1.5 mm, veinless;

upper glumes 0.5-3.5 mm, 3-5-veined;

lower florets staminate or sterile;

lower lemmas 1.5-6 mm, glabrous, 3-7-veined, margins ciliate;

lower paleas vestigial or fully developed, margins ciliate;

anthers 2.2-2.5 mm, penicillate;

upper florets coriaceous, shiny;

upper lemmas 4.3-7 mm, 5-7(9)-veined, margins ciliate;

upper paleas 3.4-3.9 mm, pubescent, at least near the base, margins ciliate;

anthers 2-2.2 mm, penicillate.

3.1-5.3 mm, sessile, glabrous;

lower glumes 1-2.5 mm, 0-1-veined;

upper glumes 1.5-3.4 mm, (0)1-3-veined, about 1/2 as long as the spikelet;

lower florets staminate or sterile;

upper florets not disarticulating at maturity;

lower lemmas 2.7-5.3 mm, 3-7-veined;

lower paleas absent or 2.5-4.5 mm;

anthers absent or 0.9-3 mm;

upper lemmas 2.8-5 mm, 3-5-veined;

anthers 3, 2-3.2 mm.

2-5.5 mm long, 1.6-3.2 mm wide, protruding from the lemma and palea at maturity.

1.2-1.8 mm long, 0.4-1 mm wide.

33-160 per cm;

fascicle axes 1-28 mm, persistent, with 1-9 spikelets;

outer bristles 44-131, 0.5-6 mm;

inner bristles 6-19, 4-6 mm, plumose;

primary bristles 5.5-6.3, ciliate, sometimes noticeably longer than the other bristles.

11-24 per cm, disarticulating at maturity;

fascicle axes 0.2-1.1 mm, with 1-12 spikelets;

outer bristles 10-62, 0.1-1.8 mm, not exceeding the spikelets;

inner bristles 6-32, 1.2-5 mm, ciliate, fused for 1/3 – 1/2 their length; flattened, grooved;

primary bristles 2.9-6.5 mm, ciliate, not noticeably longer than the other bristles.

= 14.

= 34, 36, 37, 54, 72.