Flora of North America species comparison

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

10-80 cm, erect to geniculate or decumbent below, glabrous.

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.

hirsute at the apices, hairs to 4 mm;

ligules 0.2-0.5 mm;

blades 2-20 cm long, 1-4.5 mm wide, flat to involute, abaxial surfaces glabrous and smooth, adaxial surfaces scabridulous.

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.

5-25 cm long, 3-12(15) cm wide, ovoid to pyramidal, usually open, sometimes contracted;

primary branches 0.6-8.5 cm, appressed or diverging to 80° from the rachises, solitary or paired at the lowest 2 nodes;

pulvini glabrous or sparsely hairy;

pedicels 1-7 mm, flexible, appressed to widely divergent, sometimes capillary.

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.

3.5-11 mm long, 1.2-2.5 mm wide, linear-oblong to narrowly lanceolate, plumbeous, yellowish-brown, or dark reddish-purple, with 6-22 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.

subulate to ovate-lanceolate, hyaline;

lower glumes 0.5-1.5 mm, at least 1/2 as long as the adjacent lemmas;

upper glumes 1-1.7 mm, usually broader than the lower glumes;

lemmas 1-2.2 mm, ovate-lanceolate, hyaline to membranous, grayish-green proximally, reddish-purple distally, lateral veins moderately conspicuous, apices acute;

paleas 1-2 mm, hyaline to membranous, keels scabridulous, apices obtuse;

anthers 3, 0.2-0.7 mm, purplish.

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.

0.5-1.1 mm, pyriform, slightly laterally compressed, smooth, faintly striate, brownish.

= 40, 60.

= 60.