Flora of North America species comparison

10-130 cm, erect, sometimes geniculate, glabrous, sometimes with a ring of glandular depressions below the nodes.

(30)45-100 cm, erect, glabrous below the nodes.

sometimes with glandular pits, pilose near the apices and on the collars, hairs to 4 mm, papillose-based;

ligules 0.2-0.5 mm, ciliate;

blades 5-25 cm long, 2-7(9) mm wide, flat, abaxial surfaces glabrous, adaxial surfaces scabridulous, occasionally pubescent near the base.

rarely glabrous, apices and distal margins usually hairy, sometimes also densely hairy basally, dorsally, and on the collars, hairs to 6 mm, papillose-based;

ligules 0.2-0.4 mm;

blades 25-60 cm long, 3-8(11) mm wide, flat to loosely involute, usually glabrous, adaxial surfaces sometimes hairy basally.

(5)10-40 cm long, (2)4-18 cm wide, ovate, rachises angled and channeled;

primary branches 3-12(15) cm, solitary to whorled, appressed or diverging to 80° from the rachises;

secondary branches somewhat appressed;

pulvini glabrous;

pedicels 1-6(7) mm, almost appressed to narrowly divergent, stiff.

25-85 cm long, 15-40 cm wide, broadly ovate, open;

primary branches mostly 4-35(45) cm, diverging 20-90° from the rachises, capillary;

pulvini glabrous or hairy;

pedicels 2-28 mm, divergent.

(4)5-10(11) mm long, 0.7-2.4 mm wide, ovate to linear-lanceolate, gray-green to purplish, with 5-11(15) florets;

disarticulation acropetal.

2-4(5) mm long, 1-1.7 mm wide, lanceolate, greenish with purplish tinges, with 2-6 florets;

disarticulation acropetal, paleas persistent.

subequal, 0.7-2(2.3) mm, ovate to lanceolate, membranous;

lemmas 1.2-2.4 mm, ovate, membranous, glabrous or with a few hairs, gray-green, lateral veins evident, often greenish, apices acute;

paleas 1-2.2 mm, hyaline, keels scabrous, apices obtuse to truncate;

anthers 3, 0.2-0.5 mm, purplish.

lanceolate, hyaline to membranous;

lower glumes 1.1-2 mm;

upper glumes 1.5-2.8 mm, apices acuminate to acute;

lemmas 1.6-2.4 mm, ovate, membranous, hyaline near the margins, lateral veins inconspicuous, apices acute;

paleas 1.2-2.2 mm, hyaline, bases not projecting beyond the lemmas, apices acute to obtuse;

anthers 3, 0.3-0.8 mm, purplish.

0.5-0.8(1) mm, ovoid to rectangular-prismatic, laterally compressed, shallowly to deeply grooved on the adaxial surface, striate, reddish-brown, distal 2/3 opaque.

0.8-1 mm, rectangular-prismatic, somewhat laterally compressed, with or without a well-developed adaxial groove, striate, opaque, reddish-brown.

= 60.

= 100.