Flora of North America species comparison

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

30-90 cm, erect or decumbent, glabrous below the nodes.

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

hairy at the apices and on the collars, sometimes also on the distal portion of the margins, hairs to 5 mm;

ligules 0.4-0.5 mm;

blades 5-30 cm long, 1-3 mm wide, usually involute, sometimes flat, abaxial surfaces glabrous or sparsely pilose, hairs to 5 mm, adaxial surfaces scabridulous.

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.

20-65 cm long, 10-35 cm wide, ovate, open;

primary branches 2-20(24) cm, widely spaced, diverging 20-100° from the rachises, not rebranched, naked basally;

pulvini hairy;

pedicels 0-12 mm, appressed, proximal spikelets on each branch sessile or subsessile, the pedicels shorter than 0.4 mm.

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.

5-13 mm long, 1.4-3 mm wide, oblong to oblanceolate, stramineous to reddish-purple, with 3-12 florets;

disarticulation tardy, basipetal, in the rachilla 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.

lanceolate, broad basally, indurate;

lower glumes 2.5-6 mm;

upper glumes 3-6 mm, apices acuminate;

lemmas 3-5 mm, narrowly ovate to lanceolate, indurate, apices acuminate;

paleas 2.4-4.6 mm, indurate, gibbous basally but the sides not projecting beyond the lemmas, keels ciliolate, apices obtuse;

anthers 3, 0.3-0.5 mm, reddish-brown.

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

0.9-1.5 mm, ovoid to pyriform, laterally flattened, tapering distally, smooth to faintly striate, brownish.

= 40.

= 40.