Flora of North America species comparison

5-40 cm, erect to geniculate;

nodes usually pubescent.

21-75 cm, rarely geniculate, 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.

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

5-12 cm long, 6-10 mm wide, erect, often partially enclosed at maturity, pale green.

straight, usually slightly divergent at maturity.

bent, strongly 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: glumes 11-28 mm long, 0.2-0.4 mm wide, flattened near the base, setaceous above the middle;

lemmas 5-9 mm, glabrous, awned, awns 10-22 mm;

anthers 1-2.2 mm.

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 sterile;

glumes to 27 mm long, 0.2-0.4 mm wide, flattened near the base;

lemmas 2.5-5 mm, unawned or awned, awns to 3 mm, lemma and awn together to 7 mm, the transition from the lemma to the awn gradual.

sheaths pubescent;

upper sheaths glabrous;

ligules 0.6-1.8 mm;

auricles absent;

blades to 13 cm long, to 4 mm wide, flat, glaucous, both surfaces scabrous, hairy, sometimes only sparsely hairy.

= 14.

= 42.