Flora of North America species comparison

30-100 cm, erect;

nodes glabrous.

1.5-2(4) m, decumbent, geniculate, branching;

nodes glabrous.

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.

green;

sheaths glabrous;

ligules 0.5-1.5 mm;

blades 23-40 cm long, 7-12 mm wide, flat, glabrous.

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, 15-22 cm long, 15-21 mm wide, fully exerted from the sheaths, flexible, drooping, green;

rachises terete, puberulent.

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.

5.2-6.6 mm, sessile;

lower glumes 1.7-2.9 mm, 1-veined;

upper glumes 4.5-6.3 mm, about as long as the spikelets, (7)9-veined;

lower florets sterile;

lower lemmas 4.8-6 mm, 7-veined, acuminate to attenuate, midvein excurrent for 0-0.6 mm;

lower paleas absent;

upper lemmas 4.9-6 mm, 5-veined, acuminate to attenuate, midvein excurrent for 0-0.6 mm;

anthers 1.3-1.7 mm.

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.

24-49 per cm;

fascicle axes 0.4-0.5 mm, with 1 spikelet;

most bristles only slightly longer than the spikelets;

outer bristles 27-41, 2.4-8.5 mm;

inner bristles 3-5, 6.2-11 mm, scabrous;

primary bristles 7.6-11.8 mm, not noticeably longer than the other bristles, scabrous.

= 18.

= 36.