Flora of North America species comparison

5-40 cm, erect to geniculate;

nodes usually pubescent.

10-55 cm, erect;

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.

2.2-7 cm long, 4-8 mm wide, often partially enclosed at maturity, pale green or with a reddish tinge to the glumes and awns.

straight, usually slightly divergent at maturity.

straight, ascending to 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: glumes 5.5-20.5 mm long, to 0.5 mm wide, setaceous to slightly flattened near the base;

lemmas 5-9 mm, glabrous, awned, awns 3-12 mm;

anthers 0.5-1.5 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 or staminate, occasionally bisexual;

glumes 5-20 mm;

lower glumes slightly flattened near the base;

upper glumes setaceous throughout;

lemmas 1.8-8.5 mm, unawned or awned, awns to 1 mm.

sheaths pubescent;

ligules 0.3-0.8 mm;

auricles absent;

blades to 7.5(13.5) cm long, to 4.5 mm wide, sparsely to densely pubescent on both sides.

= 14.

= 28.