Flora of North America species comparison

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

60-95 cm, slender, erect, glabrous.

glaucous;

sheaths compressed, scabridulous, glabrous or almost so;

ligules 1-1.5 mm, truncate, erose-ciliate;

blades 10-25 cm long, 2-2.5 mm wide, flat, scabrous, young blades ciliate basally.

5-9 cm, mostly erect, often included in the subtending leaves, with 2 rames;

rames 3.5-5 cm, enclosed or exerted at maturity;

internodes 4-6.3 mm, ciliate proximally, densely villous on the distal 1/2 - 2/3, hairs 4-7 mm.

3-5 mm, glabrous.

5-6 mm, 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 7-8 mm;

calluses 0.2-0.5 mm, hairs 1-2 mm;

lower glumes glabrous, keels scabridulous distally;

awns 14.5-17.5 mm, once-geniculate.

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

spikelets 0.8-4 mm, sterile, unawned.

= 60.

= unknown.