Flora of North America species comparison

16-75 cm, erect;

nodes glabrous.

50-300 cm, erect, branching;

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.

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.

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

rachises terete, pubescent (basally).

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

rachises terete, densely pubescent.

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.

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.

concealed by the lemma and palea at maturity.

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

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.

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.

= 45.

= 14.