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)25-75 cm, usually erect, sometimes geniculate and branched below, glabrous, reddish.

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, apices usually with 0.3-2.2 mm hairs;

ligules 0.2-0.4 mm, ciliate;

blades (5)7-17 cm long, 1-3 mm wide, flat to folded basally, involute apically, abaxial surfaces glabrous, adaxial surfaces scabridulous, sometimes with scattered hairs near the base.

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)11-21 cm long, 1-13 cm wide, ovate to somewhat contracted, open;

primary branches 0.5-12 cm, (12)15-20 per culm, appressed or diverging up to 60° from the rachises, often capillary, naked near the base;

pulvini glabrous;

pedicels 0.3-5 mm, mostly appressed.

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.

2-4.6 mm long, 0.9-2 mm wide, narrowly ovate, greenish-yellow to plumbeous and with a reddish-purple tinge, with 5-15 florets;

disarticulation acropetal, 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 to ovate, membranous;

lower glumes 0.4-0.9 mm;

upper glumes 1-1.3 mm, occasionally 3-veined;

lemmas 1-1.3 mm, broadly ovate, membranous, often reddish-purple, lateral veins conspicuous, often greenish, apices acute;

paleas 0.9-1.1 mm, hyaline, keels scabridulous, apices obtuse;

anthers 2, 0.1-0.2 mm, reddish-purple.

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

0.3-0.5 mm, subglobose to obovoid, not grooved, translucent, faintly striate, reddish-brown.

= 40.

= 80.