Flora of North America species comparison

30-75 cm, erect, glabrous below.

30-70 cm, erect, geniculate, or prostrate, often rooting at the lower nodes, glabrous, with a ring of glands below the nodes.

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.

glabrous or with scattered papillose-based hairs over most of the surface, apices pilose, hairs 1-4 mm, a ring of oblong glands sometimes present below the collar;

ligules 0.2-0.5 mm;

blades 1.4-10 cm long, 2-3 mm wide, flat to involute, sparsely hairy with papillose-based hairs, abaxial surfaces often with glandular dots.

(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.

5-20 cm long, 2-7 cm wide, narrowly ovate, open;

primary branches 2-7 cm, diverging 10-70° from the rachises, lowest branches whorled, naked proximally, bases with a glandular band;

pulvini hairy;

pedicels 0.3-3.3 mm, glandular.

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.

4-5.4 mm long, 1-1.5 mm wide, linear-lanceolate, plumbeous to greenish-gray, with 3-5 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, 1.4-1.8 mm, ovate-lanceolate, membranous;

lemmas 1.5-1.8 mm, ovate, membranous, often hyaline, lateral veins inconspicuous, apices obtuse to acute;

paleas 1.3-1.7 mm, hyaline, bases not projecting beyond the lemmas, apices obtuse;

anthers 3, 0.7-1 mm, purplish.

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

0.6-0.8 mm, ovoid, terete to dorsally compressed, shallowly grooved adaxially, translucent, mostly whitish to light brown, bases often greenish.

= 40.

= unknown.