Flora of North America species comparison

5-40 cm, erect to geniculate;

nodes usually pubescent.

to 135 cm, erect or somewhat geniculate;

basal internodes usually bulbous, with 1-4 ellipsoid to pyriform bulbs per culm;

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 pubescent;

auricles well developed, to 5.5 mm;

blades to 6 mm wide, flat, scabrous, often also pubescent.

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

4.5-16.5 cm.

straight, usually 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 subsessile;

glumes 10-25 mm, flattened near the base, margins more or less ciliate;

lemmas glabrous, awns 12-50 mm;

lodicules densely pilose;

anthers 4.5-10 mm, yellow to violet.

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: lower glumes flattened near the base;

upper glumes setaceous;

lemmas usually unawned, sometimes awned, awns to 14 mm;

anthers to 9 mm.

= 14.

= 14, 28.