Flora of North America species comparison

55-125 cm, forming corms, corms attached to the rhizomes;

internodes scabridulous basally.

10-60 cm, forming corms;

internodes smooth or scabridulous.

usually scabridulous, sometimes glabrous or pilose;

ligules 0.4-5 mm, to 1.5 mm on the lower leaves, to 5 mm on the upper leaves;

blades 2-10 mm wide, abaxial surfaces smooth or scabridulous, adaxial surfaces scabridulous, glabrous or with hairs.

scabridulous to scabrous;

ligules 0.5-2.6 mm;

blades 1.2-5 mm wide, sometimes pilose on both surfaces.

8-25 cm, lax;

branches 1.7-9 cm, usually appressed to ascending, occasionally divergent, with 1-5 spikelets;

pedicels not sharply bent;

disarticulation above the glumes.

4.5-18 cm;

branches 0.8-4 cm, appressed to ascending, with 1-5 spikelets;

pedicels straight.

10-28 mm, with 2-5 bisexual florets;

rachilla internodes 1.8-2 mm.

4-17 mm, with 2-5 bisexual florets;

rachilla internodes 2.1-2.3 mm, swollen when fresh, wrinkled when dry;

disarticulation above the glumes.

4-8 mm long, 1.3-2.2 mm wide, 1-3-veined;

upper glumes 5.5-11.5 mm long, 2-3 mm wide, 3-5-veined;

lemmas 5.5-18 mm, usually strigose over the veins, hairs longest towards the base, 7-9-veined, veins prominent, apices strongly tapering and acuminate, unawned;

paleas 1/2 - 3/4 the length of the lemmas;

anthers 1.5-2.5 mm;

rudiments 4-9 mm, tapering, resembling the bisexual florets.

3-5 mm long, 1.5-2.5 mm wide, 1-3-veined;

upper glumes 3.5-7 mm long, 2.5-3.5 mm wide, 5-veined;

lemmas 4-7 mm, glabrous or scabrous, 4-11-veined, veins inconspicuous, apices rounded to acute, unawned;

paleas almost as long as the lemmas;

anthers 3, 1-2 mm;

rudiments 1.5-3.5 mm, tapering, resembling the bisexual florets.

4-5 mm.

= 18.

=18.