Flora of North America species comparison

30-100 cm, erect;

nodes glabrous.

70-200 cm, slender, erect, 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.

glabrous;

ligules 0.7-1 mm, of hairs;

blades 3.5-30 cm long, 8-24 mm wide, flat, sparsely pubescent, abruptly rounded or cordate basally;

lower blades with a 0.5-13 cm pseudopetiole.

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 and axillary, 3-8 cm, on long peduncles, fully exerted from the sheaths;

rachises terete, hispid;

disarticulation beneath the primary bristles, fascicle axes persistent.

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.

2.5-3.2 mm, sessile, green to purple.

veinless, truncate or emarginate;

lower glumes 0.2-0.3 mm;

upper glumes 0.3-0.4 mm;

lower florets sterile;

lower lemmas 2.5-3.2 mm, strigulose above, 5-7-veined;

lower paleas absent;

upper lemmas 2.3-3 mm, sparsely puberulent, 5-veined;

anthers 3, 1.5-1.9 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.

14-24 per cm;

fascicle axes 0.4-0.6 mm, with 1 spikelet, outer and inner bristles absent;

primary bristles 3.8-30 mm, scabrous.

= 18.

= unknown.