Flora of North America species comparison

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

10-80 cm, erect to geniculate or decumbent below, glabrous.

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.

hirsute at the apices, hairs to 4 mm;

ligules 0.2-0.5 mm;

blades 2-20 cm long, 1-4.5 mm wide, flat to involute, abaxial surfaces glabrous and smooth, adaxial surfaces scabridulous.

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.

5-25 cm long, 3-12(15) cm wide, ovoid to pyramidal, usually open, sometimes contracted;

primary branches 0.6-8.5 cm, appressed or diverging to 80° from the rachises, solitary or paired at the lowest 2 nodes;

pulvini glabrous or sparsely hairy;

pedicels 1-7 mm, flexible, appressed to widely divergent, sometimes capillary.

(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.

3.5-11 mm long, 1.2-2.5 mm wide, linear-oblong to narrowly lanceolate, plumbeous, yellowish-brown, or dark reddish-purple, with 6-22 florets;

disarticulation acropetal, paleas 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.

subulate to ovate-lanceolate, hyaline;

lower glumes 0.5-1.5 mm, at least 1/2 as long as the adjacent lemmas;

upper glumes 1-1.7 mm, usually broader than the lower glumes;

lemmas 1-2.2 mm, ovate-lanceolate, hyaline to membranous, grayish-green proximally, reddish-purple distally, lateral veins moderately conspicuous, apices acute;

paleas 1-2 mm, hyaline to membranous, keels scabridulous, apices obtuse;

anthers 3, 0.2-0.7 mm, purplish.

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

0.5-1.1 mm, pyriform, slightly laterally compressed, smooth, faintly striate, brownish.

= 40.

= 60.