Flora of North America species comparison

30-75 cm, erect, glabrous below.

25-60 cm, erect, glabrous and shiny.

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.

mostly glabrous, apices hairy, hairs to 5 mm;

ligules 0.2-0.4 mm, ciliate;

blades 10-30 cm long, 2-5.5 mm wide, flat to involute, glabrous abaxially, scabridulous adaxially.

(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.

10-45 cm long, 2.5-22 cm wide, ovate, open to contracted;

primary branches 4-17 cm, appressed or diverging up to 50° from the rachises, flexible, naked below;

pulvini glabrous or hairy, hairs to 5 mm;

pedicels 2.5-17 mm, appressed or 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.

4-11 mm long, 1.3-2.5 mm wide, linear-lanceolate to ovate, stramineous, grayish-green to purplish, with 4-16 florets;

disarticulation tardy, acropetal, caryopses falling before the glumes and lemmas, 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.

lanceolate, membranous to hyaline;

lower glumes 1-2 mm;

upper glumes 1.5-2.8 mm;

lemmas 1.6-3 mm, lanceolate, membranous, apices acute;

paleas 1.4-2.2 mm, hyaline, keels scabridulous, apices obtuse;

anthers 3, 0.2-0.5 mm, purplish.

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

0.7-1.3 mm, obovoid, not grooved, smooth, light brown to whitish.

= 40.

= 40.