Flora of North America species comparison

14-100 cm, not forming corms;

internodes smooth.

40-120 cm, not forming corms;

internodes smooth.

glabrous or scabrous;

ligules 2.5-7 mm;

blades 1.2-3 mm wide, abaxial surfaces glabrous, scabridulous, adaxial surfaces puberulent.

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.

5-25 cm;

branches 1-5 cm, appressed to reflexed, straight, with 2-9 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.

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

rachilla internodes 3.4-3.8 mm.

5.5-8 mm long, 1.8-3 mm wide, 5-veined;

upper glumes 5-8 mm long, 0.7-1.5 mm wide, 3-5-veined;

lemmas 4.5-8 mm, 9-15-veined, veins prominent, tuberculate, proximal portion with flat, twisted hairs, distal portion glabrous, chartaceous, apices emarginate to acute, unawned;

paleas about 3/4 the length of the lemmas;

anthers 1.5-3 mm;

rudiments 2-3 mm, obovoid or obconic, clublike, 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.

=18.