Flora of North America species comparison

7-210 cm tall, usually 1-3 mm thick, not rooting or branching at the lower nodes.

35-80 cm, solitary, decumbent, branching at the lower nodes, often rooting from nodes in contact with the soil.

rounded or keeled, glabrous or pubescent, sometimes glaucous;

ligules 0.5-2 mm, collars neither elongate nor narrowed;

blades 7-105 cm long, 1.5-9 mm wide, without a longitudinal stripe of white, spongy tissue.

glaucous throughout;

sheaths shorter than the internodes, keeled;

collars constricted, elongate;

ligules 0.5-1 mm;

blades 11-142 cm long, 3.5-5.5 mm wide, folded, without a longitudinal stripe of white, spongy tissue.

0.8-10 cm;

rames 2.5-8 cm, partially to completely exserted, usually somewhat open;

internodes 3-7 mm, usually arcuate at maturity, ciliate on at least the distal 1/2 (sometimes throughout), hairs 1.5-6 mm.

1-6 cm; subtending leaf sheaths 3.2-6.6 cm long, 3-6.5 mm wide;

rames 2.5-6.5 cm, flexuous, usually partially exserted, appearing somewhat open;

internodes 4-5.5 mm, straight, pubescent for 1/2 - 3/4 of their length, hairs 2.5-6 mm.

3-7.5 mm long, 0.1-0.2 mm wide at the base, flaring above midlength to 0.3-0.5 mm, straight or curving outwards.

5-7 mm, as conspicuously villous as the rachis.

spikelets 3-11 mm;

calluses 0.5-1(2) mm, hairs 0.3-4 mm;

lower glumes glabrous;

upper lemmas membranous throughout, cleft to 1/2 their length;

awns 2.5-17 mm.

spikelets 9-11 mm;

calluses 0.3-0.5 mm;

hairs to 1 mm;

awns 8-13 mm.

spikelets 0.7-10 mm, sometimes shorter than the sessile spikelets, sterile or staminate, unawned or awned, awns to 4 mm, when sterile, the lemma usually absent.

spikelets 4.5-8.5 mm, staminate, unawned or awned, awns to 3.5 mm.

= 40.

= 40.