Flora of North America species comparison

20-100 cm.

30-100 cm;

nodes pubescent, hairs appressed.

compressed, glabrous, margins villous distally;

ligules 1-2.5 mm, ciliate;

blades 8-25 cm long, 2-5 mm wide, flat or folded, scabrous on both surfaces.

with ciliate margins;

ligules ciliate;

blades to 12(25) cm long, to 10(20) mm wide, flat, hispid on both surfaces.

6-15 cm, tightly spikelike, pale green;

rachises scabrous or villous;

bristles usually solitary, 4-15 mm, ascending.

3-18 cm, loosely spicate, interrupted, often purple;

rachises hispid;

bristles 1-3, 5-15 mm, flexible, antrorsely scabrous.

2.2-2.8(3) mm, elliptical.

1.5-2.2 mm.

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

upper glumes from 3/4 as long as to equaling the florets, 5-veined;

lower lemmas equaling the upper lemmas, 5-veined;

lower paleas 1/2 - 3/4 as long as the upper paleas, lanceolate;

upper lemmas apiculate, finely and transversely rugose;

upper paleas similar.

about 1/3 as long as the spikelets, distinctly 3-veined, lateral veins coalescing with the central veins below the apices;

upper glumes nearly equaling the upper lemmas, obtuse, 5-veined;

lower lemmas equaling the upper lemmas;

lower paleas about 1/3 as long as the lower lemmas, narrow;

upper lemmas finely and transversely rugose;

upper paleas similar to the upper lemmas.

= 54, 68, 72.

= unknown.