Flora of North America species comparison

30-100 cm, erect;

nodes glabrous.

1.5-3 m, erect;

nodes pubescent.

glabrous, margins ciliate;

ligules 0.2-0.5 mm, membranous, ciliate;

blades (10)30-60 cm long, 2-8(12) mm wide, flat to folded, glabrous, margins ciliate basally.

pubescent or scabrous, margins ciliate;

ligules 1.3-2 mm;

blades 30-75 cm long, 19-45 mm wide, flat, glabrous, pseudopetiolate.

all terminal, 6-20 cm long, 20-53 mm wide, fully exerted from the sheaths, erect, green to brown, deep purple, or stramineous to creamy-white;

rachises terete, with pubescent hairs.

terminal on the culms and axillary in the upper leaf sheaths, 2.2-9.5 cm long, 10-15 mm wide, fully exerted from the sheaths, flexible, drooping, green to stramineous;

rachises terete, scabrous or sparsely pubescent.

5.5-8.4 mm, sessile or subsessile, glabrous;

pedicels to 0.1 mm;

lower glumes 0.2-1.4 mm, veinless;

upper glumes 2-4.9 mm, to 1/2 as long as the spikelet, 1-5-veined, acute to broadly acute;

lower florets sterile;

lower lemmas 4.9-8.1 mm, 7-9(10)-veined;

lower paleas absent;

upper lemmas 5.2-7.6 mm, 5-7-veined, acuminate;

anthers 3, 3-4.5 mm.

4-7 mm, sessile;

lower glumes 1.2-2.2 mm, 1(2)-veined, scabridulous and ciliolate distally;

upper glumes 1.8-3.3 mm, 3-veined, margins ciliolate;

lower florets sterile;

lower lemmas 4.8-6.8 mm, 5-8-veined;

lower paleas absent;

upper lemmas 4.6-5.5 mm, 5-veined;

upper paleas 2-3-veined;

anthers 1.2-1.5 mm.

2.5-2.8 mm long.

9-16 per cm;

fascicle axes 1.5-5.6 mm, with a stipelike base of 1-5.6 mm and 1(2) spikelet(s);

outer bristles 13-19, 0.8-15.6 mm;

inner bristles 7-10, 11.2-30 mm, scabrous;

primary bristles 26.7-35 mm, scabrous, usually not noticeably longer than the other bristles.

5-13 per cm;

fascicle axes about 0.3 mm, with 1(2) spikelet(s);

outer bristles 8-33, 1.1-11 mm, brittle;

inner bristles absent;

primary bristles (11.5)15.7-26.5 mm, scabrous, noticeably longer than the other bristles.

= 18.

= 36.