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.

70-110 cm, erect, glabrous below the nodes.

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.

hairy at the apices and sometimes on the upper margins, hairs to 4 mm, not papillose-based;

ligules 0.2-0.4 mm;

blades (8)12-30 cm long, 1.5-3.8 mm wide, flat to involute, abaxial surfaces glabrous, adaxial surfaces scabridulous, glabrous or sparsely hairy, hairs to 4 mm.

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.

25-45 cm long, (5)12-30 cm wide, broadly ovate, open;

primary branches mostly 4-20 cm, diverging 20-90° from the rachises, capillary, sinuous;

pulvini glabrous or hairy;

pedicels 1-18 mm, appressed or divergent, proximal spikelets on each branch usually with pedicels shorter than 5 mm.

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.

5-9 mm long, 1-3 mm wide, lanceolate, plumbeous, with 5-12 florets;

disarticulation acropetal, glumes first, then the lemmas, 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 1.3-2.4 mm;

upper glumes 1.6-2.6 mm;

lemmas 2.4-3 mm, ovate, mostly membranous, hyaline near the margins and apices, lateral veins inconspicuous, apices acute;

paleas 1.5-3 mm, hyaline, narrower than the lemmas, apices obtuse to truncate;

anthers 3, 0.6-1.7 mm, purplish.

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

0.8-1.6 mm, subellipsoid, terete to somewhat laterally compressed, with a well-developed adaxial groove, faintly striate, opaque, reddish-brown.

= 20.

= unknown.