Flora of North America species comparison

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

55-130 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 scabridulous;

ligules 1-6.5 mm;

blades 3.5-11 mm wide, flat, abaxial surfaces smooth or scabridulous, adaxial surfaces 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.

9-26 cm;

branches 3.5-6 cm, often divergent to reflexed, straight, with 5-20 spikelets;

pedicels sharply bent and hairy below the spikelets;

disarticulation below the glumes.

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

8-12 mm, with 2-3(4) bisexual florets, apices of the lowest 2 florets not at the same level;

rachilla internodes 2.3-2.4 mm.

unequal;

lower glumes 5-9 mm long, 3.5-4.5 mm wide, more ovate than the upper glumes, 3-9-veined;

upper glumes 6-11 mm long, 2.5-3.5 mm wide, 3-7-veined;

lemmas 6.5-11.5 mm, glabrous or scabrous, somewhat indurate, with 9+ veins, veins prominent, apices rounded, unawned;

paleas about 3/4 the length of the lemmas;

anthers 1.7-3.2 mm;

rudiments 2-3 mm, clublike, not resembling the bisexual florets, in a straight line with the rachilla.

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.

=18, 36.

= 18.