Flora of North America species comparison

50-200 cm.

20-250 cm;

nodes glabrous.

glabrous, fringed with white hairs;

ligules about 2 mm;

blades 15-30 cm long, 10-20 mm wide, usually with soft hairs on the adaxial surface.

glabrous, sometimes scabridu-lous, margins ciliate distally;

ligules 1-2 mm, ciliate;

blades to 20 cm long, 4-25 mm wide, flat, scabrous or smooth, glabrous.

6-20 cm, densely spicate, arching and drooping from near the base;

rachises densely villous;

bristles (1)3(6), about 10 mm.

3-20 cm, densely spicate, nodding only from near the apices;

rachises hispid and villous;

bristles 1-3, 5-10 mm, antrorsely scabrous, usually green, rarely purple.

2.5-3 mm.

1.8-2.2 mm.

about 1 mm, acute, 3-veined;

upper glumes about 2.2 mm, obtuse, 5-veined;

lower lemmas about 2.8 mm, obtuse;

lower paleas about 2/3 as long as the lower lemmas;

upper lemmas pale, finely and distinctly transversely rugose;

upper paleas similar to the upper lemmas.

about as long as the spikelets, triangular-ovate, 3-veined;

upper glumes nearly equaling the upper lemmas, elliptical, 5-6-veined;

lower lemmas slightly exceeding the upper lemmas, 5-veined;

lower paleas about as long as the lower lemmas, hyaline;

upper lemmas very finely and transversely rugose, pale green, 5-6-veined;

upper paleas similar to the upper lemmas.

= 36.

= 18.