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.

12-60 cm, erect, glabrous or hairy near the base, often shiny below the nodes.

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.

glabrous, summits shortly pilose, hairs to 0.5 mm;

ligules 0.3-0.5 mm, ciliate;

blades 3-11 cm long, 0.7-2 mm wide, involute or flat, 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.

6-11 cm long, 2-4 cm wide, narrowly ovate, loosely contracted;

primary branches 1-3 cm, compact, appressed or diverging to 30° from the rachises, sometimes naked near the base;

pulvini glabrous;

pedicels 0.2-3 mm, diverging, scabridulous.

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.

3-6(15) mm long, 1.3-2 mm wide, linear lanceolate, stramineous, with 9-30 florets;

disarticulation irregular or basipetal, 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.

subequal, 1-1.3 mm, ovate, membranous, apices obtuse to acute;

lemmas 1.4-1.6 mm, ovate, membranous, glabrous, lateral veins conspicuous, green, sometimes obscure towards the apices, apices obtuse;

paleas 1.4-1.6 mm, hyaline, apices truncate, ciliolate;

anthers 3, 0.5-0.8 mm, yellowish.

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

0.4-0.5 mm, oblong-ellipsoid, strongly dorsally compressed, usually with a shallow dorsal groove, smooth to finely striate, mostly light brown, bases often greenish.

= 40.

= unknown.