Flora of North America species comparison

(45)60-150 cm, erect, glabrous or glandular.

10-50 cm, erect, glabrous below the nodes.

with scattered hairs, hairs to 9 mm;

ligules 0.6-1.3 mm;

blades 12-50(65) cm long, 1-3 mm wide, flat to involute, abaxial surfaces glabrous, sometimes scabridulous, adaxial surfaces with scattered hairs basally, hairs to 7 mm.

mostly basal;

sheaths mostly glabrous, apices pilose, hairs 0.4-3 mm;

ligules 0.1-0.2 mm, ciliate;

blades (1.8)5-12 cm long, 2-6 mm wide, flat to involute, abaxial surfaces glabrous, adaxial surfaces scabridulous and glabrous or sparsely hairy, hairs appressed.

16-35(40) cm long, (4)8-24 cm wide, ovate to oblong, open;

primary branches 3-14 cm, diverging 10-80° from the rachises;

pulvini glabrous or not;

pedicels 0.5-5 mm, appressed, flexible.

6-15 cm long, 0.5-7 cm wide, ovate, open to contracted;

primary branches 0.2-5 cm, appressed or diverging up to 70° from the rachises, glabrous;

pulvini glabrous;

pedicels 2-8 mm, glabrous.

4-8.2(10) mm long, 1.2-2 mm wide, linear-lanceolate, plumbeous to yellowish, with 3-10 florets;

disarticulation irregular to acropetal, proximal rachilla segments persistent.

4-8(10) mm long, (1.6)2-4 mm wide, ovate-lanceolate, loosely imbricate, straw-colored to purplish, with 12-42 florets;

disarticulation acropetal, paleas not persistent, rachillas persistent.

lanceolate, hyaline;

lower glumes 1.2-2.6 mm;

upper glumes 2-3 mm;

lemmas 1.8-3 mm, ovate, membranous, lateral veins conspicuous, apices acute;

paleas 1.8-3 mm, hyaline to membranous, apices obtuse;

anthers 3, 0.6-1.2 mm, reddish-brown.

ovate-lanceolate to lanceolate, hyaline to membranous;

lower glumes 1-1.8 mm;

upper glumes 1-2.2 mm;

lemmas 1.5-1.9 mm, broadly ovate, membranous, lateral veins raised, apices obtuse to acute;

paleas 1.4-1.9 mm, hyaline, keels scabridulous, apices acute to obtuse;

anthers 2, 0.2-0.4 mm, purplish.

1-1.7 mm, ellipsoid to obovoid, dorsally compressed, adaxial surfaces with a shallow, broad groove or ungrooved, smooth, mostly translucent, light brown, bases often greenish.

0.6-0.9 mm, ellipsoid, laterally compressed, not grooved, smooth, light brown.

= 40, 50.

= 20, ca. 30.