Flora of North America species comparison

45-100 cm, not forming corms;

internodes sometimes scabridulous above the nodes.

35-120 cm, not forming corms;

internodes scabridulous immediately above the nodes.

glabrous or pilose;

ligules 0.5-1.5 mm;

blades 1.8-6 mm wide, abaxial surfaces glabrous, scabridulous, adaxial surfaces with hairs.

glabrous or pilose;

ligules 0.8-6.5 mm;

blades 1-6 mm wide, abaxial surfaces glabrous or puberulent, adaxial surfaces with hairs.

4-25 cm;

branches 3.5-6 cm, appressed to spreading, straight, with 2-5 spikelets;

pedicels sharply bent below the spikelets;

disarticulation below the glumes.

5-36 cm;

branches 2.5-9 cm, appressed to reflexed, straight or flexuous, with 5-30 spikelets;

pedicels not sharply bent;

disarticulation above the glumes.

6-11 mm, with (1)2(4) bisexual florets, floret apices at about the same level;

rachilla internodes 1.5-1.7 mm.

3-7 mm, with 1(2) bisexual florets;

rachilla internodes 0.3-0.6 mm.

4.5-8 mm long, 3-4 mm wide, 5-7-veined;

upper glumes 5-9 mm long, 2.5-3.5 mm wide, 5-6-veined;

lemmas 6-11 mm, glabrous or scabrous, indurate, 9-11-veined, veins prominent, apices rounded to acute, unawned;

paleas about 3/4 the length of the lemmas;

anthers 1-3 mm;

rudiments 2-3 mm, clublike, not resembling the bisexual florets, at a sharp angle to the rachilla.

2-5 mm long, 1-2 mm wide, 1-veined;

upper glumes 2.5-6 mm long, 1.5-2.5 mm wide, 1-veined;

lemmas 3-7 mm, glabrous, sometimes scabrous, with 7+ veins, veins prominent, apices rounded to acute, unawned;

paleas almost as long as the lemmas;

anthers 1.5-2.5 mm;

rudiments 1-4 mm, not resembling the lower florets, longer and thicker than the terminal rachilla internode, truncate to obtuse.

= 18.

= 18.