Flora of North America species comparison

60-125 cm.

60-180 cm.

rounded or the basal sheaths keeled, glabrous, except for a few hairs on either side of the collar;

ligules 1-2 mm, membranous, ciliate;

blades 2-5 mm wide, elongate, usually involute distally.

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.

8-16(20) cm long, 1.5-4 cm wide, not dense;

branches to 8(10) cm, erect to divergent, stiff;

pedicels shorter than 1 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.

4-6 mm long, pale to dark purple, with 4-6 florets.

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

1-veined;

lower glumes 4-4.5 mm;

upper glumes about 5 mm;

lemmas 3-4 mm, veins pubescent to midlength or beyond, midveins excurrent, lateral veins often excurrent;

paleas 3-3.5 mm, veins ciliolate, bases bowed-out;

anthers 1-1.5 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.

1.5-1.8 mm.

1.8-2 mm.

= 40.

= 40.