Flora of North America species comparison

70-200 cm tall, 6-8 mm thick at the base.

70-200 cm, sometimes rooting at the lower nodes.

open;

auricles absent;

ligules membranous, truncate to rounded;

blades 4-12 mm wide, flat.

15-30 cm;

primary branches ascending to divergent, with spikelets appressed to the branches.

terminal, open panicles, some branches longer than 1 cm.

7-11 mm.

pedicellate, laterally compressed, with 3-4 florets;

rachillas prolonged beyond the base of the distal floret, internodes glabrous or with a few hairs to 0.2 mm long;

disarticulation above the glumes, between the florets.

unequal, acute to acuminate, unawned;

lower glumes shorter than the adjacent lemma, 1-5-veined;

upper glumes usually exceeding, sometimes equaling, the distal floret, 3-7-veined;

calluses short, blunt, hairy;

lemmas glabrous, rounded, 3-9-veined, veins excurrent, apices indistinctly 3-lobed or toothed, unawned;

paleas about as long as the lemmas;

lodicules free, glabrous;

anthers 3;

ovaries with pubescent apices.

5-8 mm;

upper glumes 6.5-10 mm;

calluses about 0.5 mm;

lemmas 4-9 mm;

paleas about as long as the lemmas;

anthers 2-4 mm.

shorter than the lemmas, concealed at maturity, about 2 mm, dorsiventrally compressed, x = 7.

3-7(9) mm;

blades 20-45 cm long, 4-12 mm wide.

= 28.