Flora of North America species comparison

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

30-100 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 or sparsely pilose, sometimes pilose only at the throat, sometimes scabridulous;

ligules 1-5 mm;

blades 1-2.5 mm wide, sometimes pilose on both surfaces, sometimes scabridulous.

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.

6-25 cm;

branches 1-5 cm, usually appressed, occasionally divergent, with 5-37 spikelets;

pedicels straight;

disarticulation above the glumes.

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

3.5-7 mm, with 1(2) bisexual florets.

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.

3-5 mm long, about 1 mm wide, 1-5-veined;

upper glumes 3.3-7 mm long, 1-2 mm wide, 3-5-veined;

lemmas 3.5-6 mm, scabridulous, sometimes hairy, distal hairs longer than those below, 7-veined, veins inconspicuous, apices rounded to emarginate, unawned or awned, awns 1-2 mm;

paleas slightly shorter than the lemmas;

anthers 1.5-2.5 mm;

rudiments 0.5-4 mm, clearly distinct from the bisexual florets, shorter than the terminal rachilla internode, truncate to acute.

=18, 36.

=18.