Flora of North America species comparison

5-40 cm, erect to geniculate;

nodes usually pubescent.

to 85 cm, erect, usually slender, not bulbous;

nodes glabrous.

with stripes of hairs;

ligules 0.3-0.8 mm;

auricles usually absent, shorter than 2 mm if present;

blades to 9 cm long, to 4 mm wide, both surfaces sparsely to densely hairy, hairs spreading.

, at least the basal sheaths, densely pubescent;

auricles to 1 mm, present on the basal leaves;

blades flat or involute, surfaces scabrous, densely pilose.

2.5-6.2 cm long, 4-6 mm wide, often partially enclosed at maturity, pale green.

3-7 cm.

straight, usually slightly divergent at maturity.

8-15 mm, setaceous throughout, straight, slightly divergent at maturity.

spikelets: glumes to 17 mm long, to 0.8 mm wide basally, distinctly flattened near the base;

lemmas 4.5-7.5 mm, usually sparsely pubescent towards the base, glabrous distally, awned, awns 5.6-9.8 mm, often slightly divergent at maturity;

anthers 0.6-1.2 mm.

spikelets sessile;

lemmas 5.7-9.9 mm, glabrous, awned, awns 5-15.4 mm, scabrous;

anthers 3.5-5 mm, yellow.

spikelets usually sterile;

glumes to 17.5 mm, distinctly flattened near the base;

lemmas 1.7-4.4 mm, blunt to acute, usually unawned, rarely awned, awns to 1.2 mm.

spikelets usually staminate, occasionally bisexual;

lemmas 3.7-6.9 mm, usually glabrous, sometimes sparsely pilose, awns 1.4-5.8 mm;

anthers 1.7-3.3 mm.

= 14.

= 28.