Flora of North America species comparison

30-70 cm, erect, sometimes geniculate, glabrous below the nodes.

20-70 cm, erect or decumbent, with a ring of glands below the nodes, glabrous.

usually mostly glabrous, summits hairy, hairs 2-5 mm, never papillose-based;

ligules 0.2-0.3 mm;

blades (4)8-22 cm long, 1-3.5 mm wide, involute to flat, both surfaces glabrous, margins sometimes with scattered hairs, hairs to 7 mm.

often with oblong glands below the collar, usually glabrous, rarely pilose, hairs to 1.5 mm, papillose-based, sometimes both glandular and with papillose-based hairs;

ligules 0.4-0.6 mm;

blades 3-15 cm long, 2-4 mm wide, flat to involute, abaxial surfaces glabrous or hairy, hairs to 3 mm, papillose-based.

16-28 cm long, 10-21 cm wide, ovate, open;

primary branches 0.6-15 cm, diverging up to 100° from the rachises, naked basally;

pulvini hairy;

pedicels 1.4-5(7) mm, diverging, wiry, present on all spikelets.

5-22 cm long, 2.6-10 cm wide, open, oblong, usually diffuse;

primary branches 2-9 cm, appressed or diverging to 80° from the rachises, lowest branches whorled, naked below;

pulvini glabrous or scattered pilose;

pedicels 0.8-7 mm, divergent.

2-4.5(5) mm long, 0.5-1(1.3) mm wide, narrowly lanceolate, plumbeous to reddish-purple, with 2-7 florets;

disarticulation acropetal, paleas persistent.

2-7 mm long, 1-1.5 mm wide, oblong, plumbeous to greenish-gray, with 3-14 florets;

disarticulation acropetal, paleas persistent.

broadly ovate to narrowly lanceolate, hyaline, sometimes reddish-purple;

lower glumes 0.6-1 mm;

upper glumes 1.1-1.4 mm, usually broader than the lower glumes;

lemmas 1.2-1.8 mm, broadly ovate, mostly membranous but the distal margins hyaline, lateral veins inconspicuous, apices acute;

paleas 1.1-1.7 mm, membranous to hyaline, apices obtuse;

anthers 3, 0.2-0.7 mm, reddish-purple.

subequal, 1.4-2 mm, narrowly ovate, hyaline;

lemmas 1.4-1.7 mm, ovate, membranous, lateral veins inconspicuous, apices obtuse to acute;

paleas 1.2-1.6 mm, hyaline, keels scabridulous, apices obtuse;

anthers 3, 0.7-1 mm, yellowish.

0.5-0.6 mm, obovoid to somewhat prism-shaped, terete to somewhat laterally compressed, sometimes with a weak adaxial groove, finely striate, usually opaque, faintly reddish-brown to whitish.

0.5-1.1 mm, ellipsoid to obovoid, dorsally compressed, with a shallow, broad adaxial groove, smooth, mostly translucent, mostly light brown, bases greenish.

= 40, 80, ca. 108.

= unknown.