Flora of North America species comparison

25-60 cm.

20-250 cm;

nodes glabrous.

glabrous throughout;

ligules 1-2 mm, of hairs, white;

blades usually less than 10 cm long, 5-10 mm wide, flat, broad basally, abaxial surfaces conspicuously strigose with papillose-based hairs, tapering abruptly at the apices;

bristles solitary, about 5 mm, retrorsely scabrous.

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.

2-6 cm, verticillate, green to purple;

rachises retrorsely rough hispid.

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.

1.5-2.2 mm.

1.8-2.2 mm.

about 1/2 as long as the spikelets, obtuse, 1(3)-veined;

upper glumes nearly as long as the spikelets, 5-7-veined;

lower lemmas equaling to slightly exceeding the upper lemmas;

lower paleas less than 1/2 as long as the spikelets, scalelike;

upper lemmas finely and 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.

= 18.

= 18.