Flora of North America species comparison

80-120 cm.

5-180 cm, erect, mostly glabrous, lower nodes sometimes with hairs.

shorter than the internodes, open;

ligules membranous and ciliate or of hairs;

blades 6-25 cm long, 1-8 mm wide, flat or involute, margins not thick and cartilaginous.

9-15 cm long, 1-4 cm wide, nodding, purplish;

branches appressed or narrowly ascending;

pedicels 2-3(3.5) mm.

terminal, usually panicles (sometimes reduced to racemes), 5-40 cm, exceeding the upper leaves, exserted.

7-10 mm, with 3-5 florets.

4-10(13) mm, laterally compressed, with 4-11(16) florets, more than 1 floret bisexual;

sterile florets distal to the fertile spikelets;

disarticulation above the glumes.

glabrous, 1-veined;

lower glumes 3.5-4.5 mm;

upper glumes 4-5 mm;

calluses sparsely pilose;

lemmas 4-5 mm, veins pilose at least to midlength, all 3 veins excurrent as short points;

paleas 3-3.5 mm, glabrous, bases bowed-out;

anthers 1-2(2.5) mm.

from shorter than to equaling the distal florets;

lower glumes 1(3)-veined;

lower glumes shorter than or about equal to the upper glumes, 1-3(9)-veined, unawned;

calluses usually glabrous, sometimes pilose;

lemmas hyaline or membranous, 3-veined, veins usually shortly hairy below, apices rounded to truncate, emarginate to bilobed, midvein often excurrent to 0.5 mm, lateral veins not or more shortly excurrent;

paleas glabrous or shortly pubescent on the lower back and margins, veins glabrous or ciliolate;

lodicules 2, free or adnate to the palea;

anthers 3, reddish-purple.

2-2.5 mm.

dorsiventrally compressed and reniform in cross section, dark brown;

embryos about 2/5 as long as the caryopses.

sheaths pilose;

ligules about 0.5 mm, membranous, ciliate;

blades 2-7 mm wide, flat, both surfaces sparsely pilose basally, margins smooth or scabridulous;

upper leaves with glabrous sheaths and blades.

= 10.

= unknown.