Flora of North America species comparison

30-75 cm, erect, glabrous below.

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

mostly glabrous, hairy at the apices, hairs to 4 mm;

ligules 0.2-0.3 mm;

blades 10-25(40) cm long, 1-5 mm wide, involute, glabrous abaxially, scabridulous adaxially, sometimes also sparsely pilose.

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.

(3)5-30 cm long, 1-15 cm wide, from narrowly oblong, glomerate, and interrupted below to ovate and open;

primary branches 0.5-12(16) cm, appressed or diverging up to 40° from the rachises, stiff;

pulvini glabrous or sparsely hairy;

pedicels 0-1(3) mm, appressed, flattened.

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.

6-16(23) cm long, 2.4-5 mm wide, ovate to linear-elliptic, flattened, stramineous, with reddish-purple margins or completely reddish-purple, with 10-45 florets;

disarticulation basipetal, florets falling intact and before the glumes.

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

disarticulation acropetal, paleas persistent.

ovate-lanceolate to lanceolate, membranous;

lower glumes 1.7-3 mm;

upper glumes 2.2-4 mm, apices acuminate;

lemmas 2-6 mm, ovate, membranous to leathery, apices usually acuminate or attenuate, sometimes acute;

paleas 1.5-3 mm, membranous to leathery, narrower than the lemmas, apices obtuse, sometimes bifid;

anthers 2, 0.2-0.5 mm, brownish.

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.

0.8-1.3 mm, ellipsoid, somewhat laterally flattened, smooth, reddish-brown.

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.

= unknown.