Flora of North America species comparison

30-120 (160) cm, erect, glabrous and non-glandular below the nodes.

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

sometimes villous along the margins, apices hairy, hairs to 5 mm;

ligules 0.3-0.5 mm;

blades 15-46(65) cm long, 1.5-8 mm wide, flat to involute, abaxial surfaces glabrous, adaxial surfaces scabridulous, sometimes also pilose on the basal 1/4, hairs to 4 mm.

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.

30-80 cm long, 6-30 cm wide, oblong to ovoid, diffuse;

primary branches 2-35 cm, diverging 20-90° from the rachises, naked basally;

pulvini hairy or glabrous;

pedicels 2-22 cm, diverging, capillary.

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.

3-15 mm long, 1.5—3.6 mm wide, ovate to lanceolate, greenish-yellow with a reddish-purple tinge, with (2)4-18 florets;

disarticulation acropetal, paleas persistent.

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.

subequal, 1.8-4 mm, narrowly ovate to linear-lanceolate, membranous, apices acuminate;

upper glumes as long as or longer than the basal lemmas;

lemmas 2.2-3.5 mm, broadly ovate to lanceolate, membranous, strongly keeled, keels not glandular, lateral veins conspicuous, apices acute;

paleas 1.8-2.8 mm, hyaline, narrower than the lemmas, keels ciliolate, apices obtuse to truncate;

anthers 3, 1-1.6 mm, purplish.

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.

0.8-1.3 mm, rectangular-prismatic, somewhat laterally compressed, with a wide, deep adaxial groove, faintly striate, opaque, dark reddish-brown.

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

= 40.

= 20.