Flora of North America species comparison

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

(2)6-25 cm, usually erect, sometimes decumbent, glabrous, with elliptical, yellowish, glandular pits 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.

with elliptical glandular pits, sparsely hairy at the throat, hairs to 2 mm;

ligules 0.2-0.5 mm, ciliate;

blades 2-12 cm long, 1-3 mm wide, flat to involute, abaxial surfaces scabridulous, bases with glandular pits.

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.

terminal, 4-10(15) cm long, 0.5-2 cm wide, narrowly elliptic, contracted, dense;

primary branches alternate, usually appressed, occasionally diverging to 30° from the rachises, rachises and branches with glandular pits;

pulvini glabrous;

pedicels 1.4-10 mm, appressed or divergent.

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.

3.6-7.5 mm long, 1.2-2 mm wide, narrowly ovate, light yellowish, occasionally mottled with reddish-purple, with 6-11(14) florets;

disarticulation acropetal, paleas 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.

subequal, ovate to lanceolate, hyaline;

lower glumes (0.7)0.9-1.4 mm;

upper glumes 1.2-1.8 mm;

lemmas 1.5-2.2 mm, ovate, subhyaline, stramineous, veins greenish and conspicuous, apices acute;

paleas 1.2-2 mm, hyaline, keels scabridulous, apices obtuse;

anthers 3, 0.2-0.3 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.

0.5-0.8 mm, pyriform except slightly flattened adaxially, smooth, light brown.

= 40, 50.

= unknown.