Flora of North America species comparison

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

25-80 cm, erect, glabrous and shiny below the basal nodes.

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.

sparsely hairy at the apices, hairs to 6 mm;

ligules 0.2-0.4 mm;

blades 6-30(52) cm long, 2-4.5 mm wide, flat, abaxial surfaces glabrous, adaxial surfaces scabridulous, sometimes with a few scattered hairs near the base.

(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.

(25)30-60 cm long, 15—45 cm wide, broadly ovate to obovate, open, diffuse;

primary branches mostly 5-25(32) cm, diverging 20-90° from the rachises, capillary;

pulvini hairy;

pedicels (4)10-35(50) mm, widely diverging, capillary, all the pedicels on each branch longer than the spikelets.

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.

4-18 mm long, 1.4-3 mm wide, linear-lanceolate, grayish-green or stramineous to purplish, with (6)9-30 florets;

disarticulation acropetal, below the lemmas, paleas persistent.

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.

narrowly lanceolate, membranous;

lower glumes 1.1-3.4 mm;

upper glumes 1.6-3.4 mm, apices acuminate;

lemmas 1.8-4.4 mm, lanceolate, membranous, lateral veins evident to inconspicuous, sometimes greenish, apices acute to acuminate;

paleas 1.1-3.5 mm, hyaline to membranous, narrower than the lemmas, apices obtuse;

anthers 2, 0.3-0.8 mm, purplish or brownish.

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

0.6-0.8 mm, ovoid to ellipsoid, finely striate, reddish-brown.

= 20.

= unknown.