Flora of North America species comparison

(3)9-75 cm, erect or geniculate in the lower portion, not rooting at the lower nodes, glabrous.

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

hairy on the margins and at the apices, hairs to 4 mm;

ligules 0.2-0.5 mm;

blades 1.8-12(15) cm long, 2-5 mm wide, usually flat, occasionally involute, glabrous or ciliate basally.

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.

1.7-15 cm long, 0.2-5 cm wide, cylindrical, contracted or open, branches usually forming glomerate lobes, sometimes more open, often interrupted in the lower portion;

primary branches 0.4-4 cm, appressed or diverging to 50° from the rachises;

pulvini usually glabrous, occasionally sparsely pilose;

pedicels 0.1-1 mm, erect, shorter than the spikelets, glabrous.

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.

1.8-3.2 mm long, 1-2 mm wide, elliptical-ovate to ovate-lanceolate, yellowish-brown, sometimes with a purple tinge, with 6-11 florets;

disarticulation basipetal, glumes peristent.

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.

ovate to lanceolate, keels scabridulous, veins commonly green, apices acute;

lower glumes 0.7-1.2 mm;

upper glumes 1-1.6 mm;

lemmas 0.8-1.3 mm, elliptical-ovate to lanceolate, membranous, keels scabridulous, lateral veins evident, apices obtuse to acute;

paleas 0.8-1.3 mm, membranous, keels prominently ciliate, cilia 0.2-0.8 mm, apices obtuse to acute;

anthers 2, 0.1-0.3 mm, purplish.

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.

0.4-0.5 mm, ovoid, reddish-brown.

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

= 20, 40.

= unknown.