Flora of North America species comparison

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

50-130 cm, not forming corms;

lower nodes strigose;

internodes usually smooth, sometimes puberulent below the nodes, lower 2-3 internodes usually swollen.

glabrous or shortly and sparsely pubescent;

ligules 1-4 mm;

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

glabrous or pilose;

ligules 1.5-4 mm;

blades 1.5-5 mm wide, strigose 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.

4-30 cm;

branches 3-6 cm, appressed, straight, with 4-15 spikelets;

pedicels straight;

disarticulation above the glumes.

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

5-15 mm, with 2-5 bisexual florets;

rachilla internodes 1.1-1.6 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.

3.5-12 mm long, 2.5-3 mm wide, 3-5-veined;

upper glumes 5-13 mm long, 2-2.5 mm wide, 5-7-veined;

lemmas 5-9 mm, glabrous, smooth to scabrous, 7-9-veined, veins inconspicuous, apices rounded to broadly acute, unawned;

paleas about 3/4 the length of the lemmas;

anthers 3, 1.8-3 mm;

rudiments 1.4-3 mm, clublike, not resembling the bisexual florets, truncate to acute.

=18, 36.

= 18.