Flora of North America species comparison

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

9-85 cm, not forming corms;

basal internodes often thickened;

internodes smooth.

glabrous or shortly and sparsely pubescent;

ligules 1-4 mm;

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

scabridulous;

ligules 2.5-5 mm;

blades 1.5-5 mm wide, abaxial surfaces glabrous, scabridulous, adaxial surfaces sometimes strigose, sometimes glabrous or 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.

3-30 cm;

branches 0.5-10 cm, appressed, with 1-5 spikelets;

pedicels sharply bent below the spikelets;

disarticulation below the glumes.

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

6-23 mm long, 5-13 mm wide, broadly V-shaped when mature, with 2-4 bisexual florets;

rachilla internodes 1.8-2.1 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.

6-16 mm long, 3.5-5 mm wide, 4-7-veined;

upper glumes 6-18 mm long, 3-5 mm wide, 5-9-veined;

lemmas 6-16 mm, glabrous, scabridulous, 5-9-veined, veins inconspicuous, apices acute, unawned;

paleas 1/2 - 3/4 the length of the lemmas;

anthers 1-3 mm;

rudiments 2-7 mm, resembling the lower florets, acute to acuminate.

4-5 mm.

=18, 36.

= 18.