Flora of North America species comparison

14-100 cm, not forming corms;

internodes smooth.

35-120 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 or pilose, often most pilose at the throat and collar;

ligules 0.5-1.5 mm;

blades 1.5-4.5 mm wide, abaxial surfaces smooth, adaxial surfaces scabridulous, glabrous or puberulent.

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.

6-25 cm;

branches 3-8 cm, appressed, with 2-6 spikelets;

pedicels straight;

disarticulation above the glumes.

6-8 mm, with 1 bisexual floret.

7-20 mm, with 2-6 bisexual florets;

rachilla internodes 2-2.4 mm.

obtuse to subacute;

lower glumes 4-10 mm long, 1.5-2.5 mm wide, 3-5-veined;

upper glumes 5-11 mm long, 1.8-2.5 mm wide, 5-7-veined;

lemmas 6-16 mm, hairy, hairs to 0.75 mm on the back, 0.7-1.3 mm on the margins, 9-11-veined, veins inconspicuous, apices mucronate to rounded, usually awned, awns 0.5-3 mm, fragile;

paleas about 3/4 as long as to nearly equaling the length of the lemmas;

anthers 3, 2.2-4 mm;

rudiments 2.5-6 mm, tapering, resembling the bisexual florets.

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.

about 5 mm.

= 18.

=18.