Flora of North America species comparison

60-100 cm, sometimes reclining or decumbent, glabrous.

39-160 cm, branching at the lower nodes, often rooting from nodes in contact with the soil;

lower internodes usually shortened and compressed.

glaucous;

collars usually constricted, elongate;

auricles flexible, yellow;

ligules 1.5-2 mm;

blades 10-30 cm long, 3.5-6.5 mm wide, without a longitudinal stripe of white, spongy tissue.

0.5-5 mm;

rames 3-9 cm, with 13-19 spikelets, arcuate at maturity;

internodes 4-6 mm, densely villous, hairs 3-7.5 mm.

3-5 mm, glabrous.

5-7 mm, hairy distally, hairs 5-7 mm.

not elongate, about as wide as the blade;

ligules to 0.5 mm, ciliolate;

blades 5-15 cm long, 0.5-2 mm wide, involute or flat, glabrous or sparsely hairy basally, with a wide central zone of bulliform cells evident on the adaxial surfaces as a longitudinal stripe of white, spongy tissue.

2-6 cm, eventually long-exserted;

internodes 2-4 mm, straight, glabrous.

spikelets 3.5-4.5 mm;

calluses 0.5-1 mm, hairs to 1.2 mm;

lower glumes glabrous;

upper lemmas acute, entire;

awns 6-10 mm.

spikelets 6-10 mm;

calluses 0.2-0.5 mm, glabrous;

lower glumes glabrous;

awns 9-20 mm.

spikelets usually as long as or slightly longer than the sessile spikelets, sterile, unawned.

spikelets 1.5-5 mm, often staminate, unawned or awned, awns to 3.5 mm.

= 60.

= 40.