Flora of North America species comparison

decumbent and rooting at the lower nodes, erect portion (2)5-12(20) cm, often branched, glabrous or hairy on the lower internodes.

(12)25-75 cm, usually erect, sometimes geniculate and branched below, glabrous, reddish.

pilose on the margins, collars, and at the apices, hairs 0.1-0.6 mm;

ligules 0.3-0.6 mm;

blades 0.5-2.5 cm long, 1-2 mm wide, flat to involute, abaxial surfaces glabrous, adaxial surfaces appressed pubescent, hairs about 0.2 mm.

glabrous, apices usually with 0.3-2.2 mm hairs;

ligules 0.2-0.4 mm, ciliate;

blades (5)7-17 cm long, 1-3 mm wide, flat to folded basally, involute apically, abaxial surfaces glabrous, adaxial surfaces scabridulous, sometimes with scattered hairs near the base.

terminal and axillary, 1-3.5 cm long, 0.7-2.5 cm wide, ovate, open to somewhat congested;

primary branches 0.1-0.5 cm, appressed to strongly divergent, glabrous;

pulvini sparsely pilose or glabrous;

pedicels 0.2-1 mm, ciliate.

(6)11-21 cm long, 1-13 cm wide, ovate to somewhat contracted, open;

primary branches 0.5-12 cm, (12)15-20 per culm, appressed or diverging up to 60° from the rachises, often capillary, naked near the base;

pulvini glabrous;

pedicels 0.3-5 mm, mostly appressed.

4-13 mm long, 1-1.5 mm wide, linear-oblong, often arcuate, loosely imbricate, greenish-yellow to purplish, with 12-35 florets;

disarticulation acropetal, paleas persistent.

2-4.6 mm long, 0.9-2 mm wide, narrowly ovate, greenish-yellow to plumbeous and with a reddish-purple tinge, with 5-15 florets;

disarticulation acropetal, paleas persistent.

linear-lanceolate to lanceolate, hyaline;

lower glumes 0.4-0.7 mm;

upper glumes 0.8-1.2 mm;

lemmas 1.4-2 mm, ovate, strongly 3-veined, veins greenish, apices acuminate;

paleas 0.7-1.2 mm, hyaline, keels scabridulous, apices acute to obtuse;

anthers 2, 0.2-0.3 mm, brownish.

lanceolate to ovate, membranous;

lower glumes 0.4-0.9 mm;

upper glumes 1-1.3 mm, occasionally 3-veined;

lemmas 1-1.3 mm, broadly ovate, membranous, often reddish-purple, lateral veins conspicuous, often greenish, apices acute;

paleas 0.9-1.1 mm, hyaline, keels scabridulous, apices obtuse;

anthers 2, 0.1-0.2 mm, reddish-purple.

0.3-0.5 mm, ellipsoid, somewhat translucent, light brown.

0.3-0.5 mm, subglobose to obovoid, not grooved, translucent, faintly striate, reddish-brown.

= 20.

= 80.