Flora of North America species comparison

15-45(65) cm, erect or decumbent, sometimes with crateriform glands below the nodes.

(60)75-130 cm, erect.

glabrous, occasionally glandular, apices hairy, hairs to 5 mm;

ligules 0.4-0.8 mm, ciliate;

blades (1)5-20 cm long, (1)3-5(10) mm wide, flat to involute, abaxial surfaces glabrous, sometimes glandular, adaxial surfaces scabridulous, occasionally also hairy.

glabrous, apices hairy, hairs to 4 mm;

ligules 0.1-0.3 mm;

blades (5)8-20 cm long, (1)2-3(4) mm wide, flat to involute, abaxial surfaces glabrous, adaxial surfaces mostly scabridulous, long ciliate basally.

(3)5-16(20) cm long, 2-8.5 cm wide, oblong to ovate, condensed to open;

primary branches 0.4-5 cm, appressed or diverging 20-80° from the rachises;

pulvini glabrous or hairy;

pedicels 0.2-3 mm, stout, straight, stiff, usually divergent, occasionally appressed.

(7)10-20(28) cm long, (2.5)4-15 cm wide, ovate, open;

primary branches (3)5-10(13) cm, diverging 20-60° from the rachises, wiry, somewhat capillary, naked basally;

pulvini glabrous or sparingly hairy, hairs shorter than 2 mm;

pedicels 1-10 mm, appressed, scabridulous.

6-20 mm long, 2-4 mm wide, ovate-lanceolate, plumbeous, greenish, with 10-40 florets;

disarticulation below the florets, each floret falling as a unit, rachillas persistent.

5-10(19) mm long, 1.4-2.4 mm wide, ovate-lanceolate, plumbeous to purplish, with 10-22 florets;

disarticulation acropetal, glumes first, then the florets.

broadly ovate to lanceolate, membranous, usually glandular;

lower glumes 1.2-2 mm, usually 1-veined;

upper glumes 1.2-2.6 mm, often 3-veined;

lemmas 2-2.8 mm, broadly ovate, membranous, keels with 1-3 crateriform glands, apices obtuse to acute;

paleas 1.2-2.1 mm, hyaline, keels scabrous, sometimes also ciliate, cilia to 0.3 mm, apices obtuse to acute;

anthers 3, 0.2-0.5 mm, yellow.

subequal, lanceolate to ovate, membranous;

lower glumes 1.2-1.4 mm, narrower than the upper glumes;

upper glumes 1.4-1.7 mm;

lemmas (1.5)1.7-2 mm, broadly ovate, leathery, keels scabridu-lous, lateral veins evident, apices acute;

paleas 1.4-1.9 mm, hyaline, bases not projecting beyond the lemmas, keels scabridulous, apices acute to obtuse;

anthers 3, 0.7-0.9 mm, reddish-purple.

0.5-0.7 mm, globose to broadly ellipsoid, smooth to faintly striate, not grooved, reddish-brown or translucent.

0.6-0.9 mm, obovoid to ellipsoid, terete, opaque, somewhat striate, reddish-brown.

= 20.

= 60.