Flora of North America species comparison

50-300 cm, erect, branching;

nodes glabrous.

50-200 cm, erect, branching, smooth or scabrous beneath the panicle;

nodes shortly pubescent or 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, sometimes glaucous;

sheaths glabrous, margins ciliate;

ligules 1-1.5 mm;

blades 34-44 cm long, 5-10 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.

all terminal, 8-17 cm long, 12-28 mm wide, erect, white;

rachises scabrous below, sometimes puberulent above.

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.

5.2-6.7 noticeably longer than the other bristles.;

spikelets 5.2-6.7 mm;

pedicels 0.1-0.5 mm;

lower glumes 0.9-1.8 mm, 0-1-veined;

upper glumes 2.6-4.2 mm, 1-5-veined;

lower florets staminate;

lower lemmas 5.1-6.4 mm, 5(6)-veined;

lower paleas 4.5-5.3 mm;

anthers 2.8-3.3 mm;

upper florets not disarticulating at maturity;

upper lemmas 5-5.8 mm, 5(6)-veined;

upper paleas with a bifid apex, teeth 0.1-0.2 mm;

anthers 2.6-3.2 mm.

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

concealed by the lemma and palea at maturity.

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.

6-15 per cm;

fascicle axes 0.6-3.1 mm, with 1-6 spikelets;

outer bristles 20-60, 0.8-12.3 mm;

inner bristles 3-7, 5.5-16.5 mm, flattened, neither grooved nor fused, ciliate;

primary bristles 12.9-22.5 mm, ciliate, noticeably longer than the other bristles.

= 14.

= 18, 36, 45.