Flora of North America species comparison

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

30-85(110) cm, glabrous and shiny below the nodes.

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

sparsely hairy at the apices, hairs to 6 mm;

ligules 0.1-0.4 mm;

blades 10-35 cm long, 2-5 mm wide, flat to involute, glabrous abaxially, scabridulous and sparsely pilose adaxially, 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.

(25)30-60 cm long, 25-40 cm wide, broadly ovate to obovate, open, diffuse;

primary branches 5-25 cm, diverging 20-90° from the rachises, capillary;

pulvini hairy or glabrous;

pedicels 0.5-25 mm, appressed, only the terminal pedicels on each branch longer than the spikelets.

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.

4-18(23) mm long, 1.4-3.4 mm wide, linear-lanceolate, grayish-green or stramineous to purplish, with (4)9-30 florets;

disarticulation tardy, basipetal, in the rachillas below the florets, glumes 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.

narrowly lanceolate, membranous;

lower glumes 0.8-2.4 mm;

upper glumes 1.5-2.6 mm;

lemmas 1.4-2.8 mm, lanceolate, membranous, apices acute to acuminate;

paleas 1-2.6 mm, hyaline to membranous, narrower than the lemmas, apices obtuse to acute;

anthers 2, 0.3-0.5 mm, purplish or brownish.

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

0.5-0.9 mm, ovoid to ellipsoid, finely striate, reddish-brown.

= 40.

= 28.