Flora of North America species comparison

10-45 cm, erect to decumbent, sometimes with a ring of glandular tissue below the nodes.

30-62 cm, erect, glabrous and shiny below the nodes.

sometimes glandular on the midveins, hairy at the apices, hairs

sometimes densely pilose dorsally and on the collars, margins and apices hairy, hairs to 5 mm;

ligules 0.2-0.4 mm;

blades 5-20(33) cm long, 1-3.5 mm wide, involute to flat, both surfaces with scattered hairs, adaxial surfaces densely hairy behind the ligules, hairs to 7 mm.

4-20 cm long, 2.2-8(10) cm wide, ovate, open to contracted, rachises sometimes with glandular spots or pits below the nodes, rarely with a glandular ring, glands usually dull, greenish-gray to stramineous;

primary branches 0.5-6 cm, diverging 20-100° from the rachises;

pulvini glabrous or hairy;

pedicels 1-4 mm, stiff, straight, divergent, usually with a distal ring of crateriform glands.

15-25 cm long, 5-27 cm wide, ovate, open;

primary branches 0.6-15 cm, diverging up to 90° from the rachises, capillary, naked basally;

pulvini hairy, hairs to 8 mm;

pedicels 1.4-10(16) mm, divergent.

4-7(11) mm long, 1.1-2.2 mm wide, narrowly ovate, mostly reddish-purple to greenish, occasionally grayish, with 7-12(20) florets;

disarticulation acropetal, paleas persistent.

(2.5)3-5 mm long, 1.1-1.6 mm wide, narrowly lanceolate to linear-oblong, plumbeous, with 4-9 florets;

disarticulation acropetal, paleas persistent.

broadly ovate, membranous;

lower glumes 0.9-1.4 mm;

upper glumes 1.2-1.6 mm;

lemmas 1.4-1.8 mm, broadly ovate, membranous, keels occasionally with 1-2 crateriform glands, apices acute to obtuse;

paleas 1.3-1.7 mm, hyaline, keels smooth or scabridulous, scabridities to 0.1 mm, apices obtuse to acute;

anthers 2, 0.2-0.3 mm, reddish-brown.

broadly ovate to narrowly lanceolate, hyaline to membranous;

lower glumes 1.1-1.6 mm;

upper glumes 1.2—1.8 mm;

lemmas 1.2-1.8 mm, broadly ovate, membranous throughout, lateral veins inconspicuous, apices acute;

paleas 1.1-1.7 mm, membranous to hyaline, narrower than the lemmas, apices obtuse;

anthers 3, 0.3—0.5 mm, reddish-purple.

0.4-0.7 mm, ellipsoid, not grooved, striate, light brown.

0.5-0.8 mm, obovoid to somewhat prism-shaped, laterally compressed, with a well-developed adaxial groove, finely striate, opaque to translucent, reddish-brown.

= 40.

= 60, 80.