Flora of North America species comparison

30-62 cm, erect, glabrous and shiny below the nodes.

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

sometimes densely pilose dorsally and on the collars, margins and apices hairy, hairs to 5 mm;

ligules 0.2-0.4 mm;

blades 5-20(33) cm long, 1-3.5 mm wide, involute to flat, both surfaces with scattered hairs, adaxial surfaces densely hairy behind the ligules, hairs to 7 mm.

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.

15-25 cm long, 5-27 cm wide, ovate, open;

primary branches 0.6-15 cm, diverging up to 90° from the rachises, capillary, naked basally;

pulvini hairy, hairs to 8 mm;

pedicels 1.4-10(16) mm, divergent.

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.

(2.5)3-5 mm long, 1.1-1.6 mm wide, narrowly lanceolate to linear-oblong, plumbeous, with 4-9 florets;

disarticulation acropetal, paleas persistent.

(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.

broadly ovate to narrowly lanceolate, hyaline to membranous;

lower glumes 1.1-1.6 mm;

upper glumes 1.2—1.8 mm;

lemmas 1.2-1.8 mm, broadly ovate, membranous throughout, lateral veins inconspicuous, apices acute;

paleas 1.1-1.7 mm, membranous to hyaline, narrower than the lemmas, apices obtuse;

anthers 3, 0.3—0.5 mm, reddish-purple.

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.

0.5-0.8 mm, obovoid to somewhat prism-shaped, laterally compressed, with a well-developed adaxial groove, finely striate, opaque to translucent, reddish-brown.

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

= 60, 80.

= 40.