Flora of North America species comparison

5-40 cm, erect to geniculate;

nodes usually pubescent.

10-60 cm, erect, geniculate, or ascending;

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.

glabrous or slightly pubescent;

ligules 0.2-0.8 mm;

auricles absent;

blades to 10.5 cm long, to 4.5 mm wide, sparsely to densely pubescent on both sides.

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

2-9 cm long, 3-7 mm wide, erect, often partially enclosed at maturity, pale green.

straight, usually slightly divergent at maturity.

straight, not 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 8-17 mm long, 0.5-1.5 mm wide, distinctly flattened near the base;

lemmas 5-8.5 mm, usually glabrous, sometimes sparsely to densely pubescent, awned, awns 3.5-9.5 mm;

anthers 0.7-1.8 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 usually sterile;

glumes to 18 mm;

lower glumes distinctly flattened, more or less winged basally;

lemmas 2.5-5.7 mm, usually awned, awns to 1.8 mm, rarely unawned;

anthers 0.6-1.2 mm.

= 14.

= 14.