Flora of North America species comparison

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

(15)20-50(60) cm, erect, glabrous, often shiny 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.

pilose along the margins, apices hirsute, hairs to 7 mm;

ligules 0.2-0.5 mm, ciliate;

blades (6)8-20(30) cm long, (1)2-5 mm wide, flat, abaxial surfaces smooth, glabrous, adaxial surfaces scabridulous, with long scattered hairs.

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.

(10)15-45(55) cm long, (7)10-25 cm wide, to 2/3 the height of the plants, elliptic to ovate, open, rachises without glandular pits;

primary branches (2)5-15 cm, diverging 20-90° from the rachises, capillary, naked basally;

pulvini glabrous;

pedicels (4)5-25 mm, divergent, scabridulous.

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.

(1.4)2-5 mm long, 1-1.3(1.4) mm wide, ovate to lanceolate, plumbeous, occasionally reddish-purple, with 2-5(7) 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.

narrowly lanceolate to lanceolate, hyaline;

lower glumes 1-1.2 mm, narrower than the upper glumes;

upper glumes 1.2-1.4 mm;

lemmas 1.2-1.7 mm, broadly ovate, membranous, keels scabridulous, lateral veins inconspicuous, apices acute;

paleas 1.2-1.6 mm, hyaline, keels almost smooth to scabrous, scabridities to 0.1 mm, apices acute to obtuse;

anthers 3, 0.2-0.3 mm, reddish-brown.

0.4-0.5 mm, ovoid, reddish-brown.

0.4-0.7 mm, ovoid to rectangular-prismatic, adaxial surfaces deeply grooved, striate, bases reddish-brown, distal 2/3 opaque.

= 20, 40.

= 50, 100.