Flora of North America species comparison

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

50-90 cm tall, usually less than 1 mm thick, not rooting or branching at the lower nodes, usually glabrous.

3-7 cm;

rames 2-5.5 cm, with 5-14 spikelets, partially to fully exserted, collars neither elongate nor particularly narrow.

3-5 mm, glabrous.

3.5-5 mm, ciliate, hairs to 2.3 mm, pedicel bases 0.1-0.2 mm wide, flaring above midlength to about 0.5 mm wide, tending to curve outward, rames appearing somewhat open.

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 4-7.5 mm;

calluses sparsely pubescent, hairs to 1.5 mm;

awns 2.5-10 mm;

upper lemmas membranous throughout, apices cleft for about 1/4 of their length.

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

spikelets 2.5-5.5 mm, unawned or with awns to 1 mm.

about 0.5 mm;

blades 9.5-25 cm long, 1-3 mm wide, usually folded, without a longitudinal stripe of white, spongy tissue.

= 60.