Flora of North America species comparison

(20)40-80 cm, erect, commonly geniculate, sometimes rooting at the lower nodes, glabrous, lower portions sometimes scabridulous.

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

sometimes shortly silky pilose basally, hairs less than 2 mm, apices sparsely hairy, hairs to 3 mm;

ligules 0.3-0.5 mm, ciliate;

blades 2-12 cm long, 1-3 mm wide, flat to involute, glabrous, abaxial surfaces sometimes scabridulous, adaxial surfaces scabridulous.

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.

7-18 cm long, 2-8 cm wide, oblong, open;

primary branches 1-8 cm, appressed or diverging to 40° from the rachises;

pulvini glabrous;

pedicels 0.5-4 mm, diverging or appressed, flexible.

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.

5-12(14) mm long, 0.8-1.2 mm wide, linear-lanceolate, plumbeous to stramineous, with 4-12(14) florets;

disarticulation irregular to basipetal, paleas usually 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.

oblong to lanceolate, membranous;

lower glumes 1-1.5 mm;

upper glumes 1.3-2 mm;

lemmas 1.5-1.7 mm, ovate, membranous, lateral veins inconspicuous, apices acute to obtuse;

paleas 1.4-1.7 mm, obtuse;

anthers 3, 0.6-0.9 mm, yellowish.

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.

0.6-0.8 mm, ellipsoid to obovoid, dorsally compressed, sometimes with a shallow adaxial groove, smooth, translucent, mostly light brown, embryo region dark brown with a greenish ring.

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

= 40, 60.

= 20.