Flora of North America species comparison

1-2 m.

20-250 cm;

nodes glabrous.

strigose, margins with stiff hairs;

collars hispid;

ligules about 2 mm, of hairs;

blades to 50 cm long, 20-80 mm wide, plicate, tapering at both ends, abaxial surfaces sparsely strigose, adaxial surfaces short pubescent near the base.

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.

to 40 cm, open;

branches 6-10 cm, loosely flexible, axes scabrous;

bristles solitary, usually present only below the terminal spikelet on each branch, occasionally below non-terminal spikelets, about 5 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.

3-4 mm, elliptic, acuminate.

1.8-2.2 mm.

1/2 as long as the spikelets, obtuse, 3-4-veined;

upper glumes nearly equaling the upper lemmas, 7-veined, acute;

lower lemmas exceeding the upper lemmas, 5-veined, apices involute;

lower paleas nearly equaling the lower lemmas in length and width;

upper lemmas obscurely transversely rugose, yellow, apiculate.

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.

= 54.

= 18.