Flora of North America species comparison

30-100 cm;

lower nodes sometimes sparsely bearded.

50-100 cm;

nodes sometimes sparsely bearded.

glabrous, not or obscurely keeled;

ligules to 0.5 mm, membranous, ciliate;

blades 1-4 mm wide, folded or involute, glabrous, apices sharp.

glabrous, scabrous, or sparsely pilose, rounded;

ligules 1.2-3 mm, glabrous, membranous, usually lacerate;

blades 10-15 cm long, 1.5-5 mm wide, scabrous (occasionally sparsely pilose), apices long-attenuate.

8-25 cm long, 0.5-1.3 cm wide, dense;

branches appressed, lowest branches 2-6 cm;

pedicels 1-2 mm.

10-30 cm long, to 20 cm wide, open;

branches 5-10(12) cm, lax, ascending to reflexed at maturity, proximal internodes longer than the distal internodes;

pedicels (1.5)3-5 mm.

4-10 mm, with 4-11 florets.

3-7 mm, with 5-12 florets.

about as long as the adjacent lemmas, thin, 1-veined, acute or apiculate;

lower glumes 4-4.5 mm;

upper glumes 4-4.5 mm;

lemmas 3-4(5) mm, thin, papery, mostly white, often purple distally, glabrous or the lateral veins with a few short hairs towards the base, all veins ending before the distal margin;

paleas 3-3.5 mm, glabrous, bowed-out at the base;

anthers 1-1.5 mm.

glabrous, 1-veined, purple;

lower glumes 2-2.5 mm;

upper glumes 2-3.5 mm;

lemmas 2-3.2 mm, veins puberulent to well above midlength, midveins sometimes excurrent, lateral veins rarely reaching the distal margins;

paleas 1.5-2 mm, glabrous or scabrous basally, neither enlarged nor bowed-out;

anthers 1-1.5 mm.

1.5-1.8 mm.

1-1.3 mm.

= 60, 64, 72.

= 40.