Flora of North America species comparison

5-40 cm, erect to geniculate;

nodes usually pubescent.

to 50 cm, straight to geniculate;

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.

1.5-7 cm long, 5-10(20) mm wide, dense, green or more or less purplish on the awns and glumes;

rachises disarticulating at maturity, triplets not breaking up immediately after maturity.

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 14-26 mm long, 0.2-1.1 mm wide basally, setaceous distally;

lemmas 5-8 mm, usually smooth or somewhat scabrous, sometimes pubescent, awned, awns 6-18 mm;

anthers 0.8-1.3 mm, yellowish.

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;

lower glumes setaceous or winged, wings 0.5-2.3 mm wide;

upper glumes setaceous;

lemmas 4-6 mm, awned, awns 3-8 mm.

sheaths somewhat hairy;

ligules 0.2-0.5 mm;

auricles usually absent or to 0.3 mm;

blades to 8 cm long, 1-6 mm wide, sparsely to densely hairy on both sides.

= 14.

= 14, 28.