Flora of North America species comparison

20-60(100) cm, not forming corms.

40-120 cm, not forming corms;

internodes smooth.

glabrous or shortly and sparsely pubescent;

ligules 1-4 mm;

blades 7-15 cm long, 1-4 mm wide, usually involute.

glabrous, scabrous, sometimes sparsely pilose;

ligules 2.5-5 mm;

blades 5.5-15 cm long, 2-6 mm wide, often sparsely pilose on both surfaces.

4-8(25) cm, narrowly cylindrical, lax, pale;

branches 1.5-4 cm, appressed to ascending, with 3-12(15) spikelets;

pedicels sharply bent below the spikelets;

disarticulation below the glumes.

10-26 cm;

branches 4-6 cm, appressed or strongly ascending, with 1-4 spikelets per branch;

pedicels not sharply bent;

disarticulation above the glumes.

6-8 mm, with 1 bisexual floret, sometimes purple-tinged.

11-21 mm, with (2)3-5 bisexual florets;

rachilla internodes 3.4-3.8 mm.

4-6 mm long, 1.5-2.5 mm wide, ovate, 1-5-veined, acute;

upper glumes 6-8 mm long, about 1.5 mm wide, lanceolate, acute to acuminate;

lemmas 4-6.5 mm, lanceolate, 7-9-veined, papillose, margins and marginal veins pubescent, hairs 3.5-5 mm, not twisted;

rudiments 1-1.7 mm, ovoid, not resembling the bisexual florets.

9-11 mm long, 1.5-2.5 mm wide, 3-5-veined;

upper glumes 11-12 mm long, 2-3 mm wide, 5-7-veined;

lemmas 8-13 mm, with 0.3-0.6 mm hairs on the marginal veins, glabrous or with hairs to 0.1 mm elsewhere, 5-7-veined, veins prominent, apices bifid to emarginate, awned from the sinuses, awns 5-12 mm;

paleas about 3/4 the length of the lemmas;

anthers 2, 2-3 mm;

rudiments 2.5-6 mm, tapering, resembling the bisexual florets.

5-6 mm.

=18, 36.

=18.