Flora of North America species comparison

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

35-75 cm tall, 1-2.5 mm thick, solitary or few together, glabrous or sparsely pubescent near the nodes.

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;

sheaths glabrous, smooth;

auricles infrequently present, to 0.8 mm, the auricular location often with hairs to 2 mm;

ligules 0.3-0.5 mm, truncate, erose;

blades 4-29 cm long, 1-2(5) mm wide, flat, becoming involute when dry, stiff, adaxial surfaces scabrous, with scattered hairs to 2 mm, veins 7-11, subequal, prominently ribbed.

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.

1.5-27 cm long, 4-15 mm wide, with 1 spikelet per node at midspike, sometimes with 2 at the lower nodes;

internodes 7-20 mm, surfaces glabrous or strigillose, edges ciliate, cilia to 1 mm.

15-34 mm, with 3-6 florets.

16-25 mm, pedicellate, pedicels 1-2(5) mm, with 3-12 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.

subequal, 8-12 mm long, 0.5-1.5 mm wide, subulate, tapering from about 1/4 of their length, stiff, glabrous at least at the base, the central portion thicker than the margins, keeled, 0-1(3)-veined, veins inconspicuous at midlength;

lemmas 7-12 mm, glabrous, awned, awns 2.3-6.5(12) mm;

anthers 3.7-4.5 mm, dehiscent.

= 28.