Flora of North America species comparison

8-45(70) cm, erect or geniculate, glabrous, occasionally with a few glandular depressions.

30-100 cm, erect to geniculate, with narrow, sunken glandular bands.

mostly glabrous, occasionally glandular, apices hirsute, hairs to 3 mm;

ligules 0.1-0.3 mm, ciliate;

blades 2-15(20) cm long, 1-2.5(4) mm wide, flat, abaxial surfaces glabrous, occasionally with glandular pits along the midrib, adaxial surfaces scabridulous.

sometimes glandular, apices hairy, hairs to 5 mm;

ligules 0.4-1 mm;

blades 5-21 cm long, 2-6(7) mm wide, flat to involute, with small crateriform glands on the keels and veins, sparsely pilose adaxially.

4-20(28) cm long, 2-15(18) cm wide, ellipsoid to ovoid, diffuse;

primary branches 1-10 cm, diverging 10-80°(110°) from the rachises, capillary, whorled on the lowest 2 nodes, rarely glandular;

pulvini glabrous or hairy;

pedicels 1-10 mm, flexible, appressed or divergent.

4-19 cm long, 0.8-7 cm wide, oblong to ovate, glomerate, spikelets clustered in 1-sided groups;

primary branches 0.5-7.5 cm, diverging 10-90° from the rachises, angled, sinuous, glandular;

pulvini hairy, hairs to 2 mm;

pedicels 0.2-2 mm, stout, erect, without a narrow band or abscission line near the apices.

(2)3.5-6(10) mm long, 0.6-1.4 mm wide, linear-oblong to narrowly ovate, plumbeous, with (3)5-17 florets;

disarticulation acropetal, paleas tardily deciduous, rachillas persisting longer than the paleas.

2-5 mm long, 2-3.5 mm wide, broadly ovate, greenish, stramineous to plumbeous, with 7-14 florets;

disarticulation basipetal, glumes persistent.

narrowly ovate to lanceolate, hyaline;

lower glumes 0.3-0.6(0.8) mm;

upper glumes 0.7-1.2(1.4) mm;

lemmas 1.2-1.8(2) mm, ovate-lanceolate, membranous to hyaline, grayish-green proximally, reddish-purple distally, lateral veins inconspicuous, apices acute;

paleas 1-1.6 mm, membranous to hyaline, keels scabridulous to scabrous, apices obtuse;

anthers 3, 0.2-0.3 mm, purplish.

subequal, 1.7-2.2 mm, ovate, membranous, keels with small crateriform glands, apices acute to acuminate;

lemmas 1.8-2.3 mm, broadly ovate to orbicular, chartaceous, keels with small crateriform glands, apices acute to obtuse;

paleas 1.7-2.2 mm, chartaceous, each side with a broad wing at the base, wings often projecting beyond the lemma bases, apices acute;

anthers 3, 0.5-0.9 mm, yellowish.

0.5-1 mm, obovoid to prism-shaped, adaxial surfaces flat, smooth to faintly striate, light brown.

0.8-1.1 mm, ellipsoid, reddish-brown.

= 40.

= 30.