Flora of North America species comparison

12-170 cm tall, 3-6 mm thick, usually densely pubescent below the spikes for 10-40+ mm.

35-140 cm tall, 1.5-3 mm thick, several together.

exceeded by the spikes;

auricles to 0.7 mm;

ligules 0.2-2.5 mm;

blades 10-94 cm long, 3-15 mm wide, adaxial surfaces scabridulous to scabrous, 20-40-veined, veins subequal, prominently ribbed, closely spaced.

exceeded by the spikes;

auricles to 1 mm;

ligules 0.1-1 mm, truncate;

blades 1-5 mm wide, flat to strongly involute, adaxial surfaces glabrous or sparsely to -9 prominently ribbed, subequal long, 4-11 mm wide, nodes below midspike with 1-2(3) spikelets, distal nodes with 1 spikelet;

internodes 3.5-9 mm, surfaces glabrous, edges scabrous or strigillose.

5-34 cm long, 10-20 mm wide, with 3-33 nodes, usually with 2 spikelets per node;

internodes 4.5-9.5 mm, surfaces and edges similar, hairs on the surfaces 0.1-0.5 mm, on the edges to 0.7 mm.

15-34 mm, with 3-6 florets.

9-21 mm, pedicellate, pedicels to 1 mm, with 3-6 florets.

9-34 mm long, 1.5-4 mm wide, lanceolate, tapering from midlength or above, flat or rounded on the back, flexible, usually strigillose to pilose or villous, rarely almost glabrous, the central portion scarcely thicker than the margins, 3(5)-veined at midlength, apices acute;

lemmas 11-20 mm, densely hairy, hairs 0.5-1 mm, soft, apices acute, unawned;

anthers 4-9 mm, dehiscent.

unequal to subequal, to 12.5 mm long, 0.5-3.2 mm wide, subulate, stiff, keeled, the central portion thicker than the margins, tapering from below midlength, 0-1(3)-veined, veins inconspicuous at midlength;

lower glumes 0-12 mm;

upper glumes 3.5-12.5 mm;

lemmas 7-12.5 mm, usually glabrous, sometimes sparsely strigillose, unawned or awned, awns to 2.5 mm;

anthers 2.5-7.5 mm, dehiscent.