Flora of North America species comparison

80-120 cm.

60-180 cm.

keeled, mostly glabrous, collars pubescent;

ligules to 0.5 mm, membranous, ciliate;

blades 3-10 mm wide, glabrous or sparsely hispid, apices attenuate and involute.

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

branches appressed or narrowly ascending;

pedicels 2-3(3.5) mm.

15-40 cm long, 3-5 cm wide, erect or nodding;

branches 10-15(25) cm, strongly divergent to drooping, stiff or lax, lower branches naked for 1/3 – 1/2 of their length;

pedicels 3-8 mm.

7-10 mm, with 3-5 florets.

5-10 mm long, with 4-8 florets.

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.

2.5-3 mm, often mucronate;

upper glumes 3.5-4 mm;

lemmas 3-5 mm, lateral veins puberulent or ciliate to well above midlength, midveins and lateral veins usually excurrent, midveins extending to 0.5 mm, lateral vein extensions shorter;

paleas as long as the lemmas, widened below;

anthers 1-1.5 mm.

2-2.5 mm.

1.8-2 mm.

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.

= unknown.

= 40.