Flora of North America species comparison

(45)60-150 cm, erect, glabrous or glandular.

20-70 cm, erect or decumbent, with a ring of glands below the nodes, glabrous.

with scattered hairs, hairs to 9 mm;

ligules 0.6-1.3 mm;

blades 12-50(65) cm long, 1-3 mm wide, flat to involute, abaxial surfaces glabrous, sometimes scabridulous, adaxial surfaces with scattered hairs basally, hairs to 7 mm.

often with oblong glands below the collar, usually glabrous, rarely pilose, hairs to 1.5 mm, papillose-based, sometimes both glandular and with papillose-based hairs;

ligules 0.4-0.6 mm;

blades 3-15 cm long, 2-4 mm wide, flat to involute, abaxial surfaces glabrous or hairy, hairs to 3 mm, papillose-based.

16-35(40) cm long, (4)8-24 cm wide, ovate to oblong, open;

primary branches 3-14 cm, diverging 10-80° from the rachises;

pulvini glabrous or not;

pedicels 0.5-5 mm, appressed, flexible.

5-22 cm long, 2.6-10 cm wide, open, oblong, usually diffuse;

primary branches 2-9 cm, appressed or diverging to 80° from the rachises, lowest branches whorled, naked below;

pulvini glabrous or scattered pilose;

pedicels 0.8-7 mm, divergent.

4-8.2(10) mm long, 1.2-2 mm wide, linear-lanceolate, plumbeous to yellowish, with 3-10 florets;

disarticulation irregular to acropetal, proximal rachilla segments persistent.

2-7 mm long, 1-1.5 mm wide, oblong, plumbeous to greenish-gray, with 3-14 florets;

disarticulation acropetal, paleas persistent.

lanceolate, hyaline;

lower glumes 1.2-2.6 mm;

upper glumes 2-3 mm;

lemmas 1.8-3 mm, ovate, membranous, lateral veins conspicuous, apices acute;

paleas 1.8-3 mm, hyaline to membranous, apices obtuse;

anthers 3, 0.6-1.2 mm, reddish-brown.

subequal, 1.4-2 mm, narrowly ovate, hyaline;

lemmas 1.4-1.7 mm, ovate, membranous, lateral veins inconspicuous, apices obtuse to acute;

paleas 1.2-1.6 mm, hyaline, keels scabridulous, apices obtuse;

anthers 3, 0.7-1 mm, yellowish.

1-1.7 mm, ellipsoid to obovoid, dorsally compressed, adaxial surfaces with a shallow, broad groove or ungrooved, smooth, mostly translucent, light brown, bases often greenish.

0.5-1.1 mm, ellipsoid to obovoid, dorsally compressed, with a shallow, broad adaxial groove, smooth, mostly translucent, mostly light brown, bases greenish.

= 40, 50.

= unknown.