Flora of North America species comparison

(5)10-60 cm, erect or decumbent, much-branched near the base, with a ring of glandular tissue below the nodes, rings often shiny or yellowish.

25-60 cm, erect, glabrous and shiny.

hairy at the apices, hairs to 4 mm;

ligules 0.2-0.5 mm, ciliate;

blades 1.5-10 cm long, 1-3(5) mm wide, flat, abaxial surfaces glabrous, adaxial surfaces glabrous, sometimes scabridulous, occasionally with white hairs to 3 mm, margins without crateriform glands.

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.

4-20 cm long, 2.2-8(10) cm wide, ovate, open to contracted, rachises with shiny or yellowish glandular spots or rings below the nodes;

primary branches 0.5-6 cm, diverging 20-100° from the rachises;

pulvini glabrous;

pedicels 1-4 mm, stout, stiff, divergent, without glandular bands.

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.

4-7(11) mm long, 1.1-2.2 mm wide, narrowly ovate, reddish-purple to greenish, occasionally grayish, with 7-12(20) florets;

disarticulation acropetal, paleas persistent.

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.

broadly ovate, membranous, 1-veined;

lower glumes 0.9-1.4 mm;

upper glumes 1.2-1.6 mm;

lemmas 1.4-1.8 mm, broadly ovate, membranous, apices acute to obtuse;

paleas 1.3-1.7 mm, hyaline, keels scabrous, scabridities to 0.1 mm, apices obtuse to acute;

anthers 3, 0.1-0.2 mm, reddish-brown.

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.

0.4-0.7 mm, ellipsoid, not grooved, smooth to faintly striate, light brown.

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

= 40.

= 40.