Flora of North America species comparison

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

10-50 cm, erect, glabrous 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.

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.

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.

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.

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.

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.

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.

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.

0.4-0.5 mm, ovoid, reddish-brown.

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

= 20, 40.

= 20, ca. 30.