Flora of North America species comparison

55-130 cm, not forming corms;

internodes smooth.

60-250 cm, not forming corms, scabrous below the panicles.

glabrous or scabridulous;

ligules 1-6.5 mm;

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

retrorsely scabridulous;

ligules 3-5 mm;

blades to 20 cm long, 5-15 mm wide, flat, lax.

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.

10-20 cm long, 1-2(5) cm wide, cylindrical, pale or purplish;

branches about 3 cm, strongly ascending to appressed, often with 15+ spikelets;

pedicels sharply bent below the spikelets;

disarticulation below the glumes.

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.

7-11 mm, with 1-2(3) bisexual florets.

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.

subequal in length and similar in shape, 7-10.5 mm long, 3-4 mm wide, glabrous, ovate-elliptic, obtuse to acute, ivory or purple, 7-veined;

lemmas 7-11 mm, glabrous, scabridulous, 9-13-veined, scarious, apices acute;

paleas about 2/3 the length of the lemmas;

rudiments 2.5-3 mm, pyriform.

about 3 mm.

= 18.

= 18.