Flora of North America species comparison

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

30-70(85) cm, erect, glabrous.

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

hairy on the margins and at the apices, hairs to 7 mm;

ligules 0.1-0.2 mm;

blades 10-32 cm long, 3-8 mm wide, flat to involute, both surfaces usually pilose, sometimes glabrous on both surfaces or glabrous abaxially and sparsely pilose adaxially, often with a line of hairs behind the ligules, hairs to 8 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)25-45(60) cm long, 15-35 cm wide, broadly ovate to oblong, open, basal portions sometimes included in the uppermost leaf sheaths;

primary branches (6)12-20 cm long, diverging 20-90° from the rachises, capillary, naked below;

pulvini hairy, hairs to 6 mm;

pedicels 1.5-17 mm, divergent or appressed.

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.

3-7.5 mm long, 1-2 mm wide, linear-lanceolate, reddish-purple, sometimes olivaceous, with (4)6-12 florets;

disarticulation basipetal, 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.

subequal to equal, (1)1.3-2.3 mm, lanceolate, membranous to chartaceous;

lemmas (1)1.3-2.5 mm, ovate to lanceolate, leathery, 3-veined, apices acute;

paleas (1)1.2-2.4 mm, membranous, keels sometimes shortly ciliate, apices obtuse to truncate;

anthers 3, 0.3-0.5 mm, purplish.

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

0.6-0.8 mm, ellipsoid, strongly flattened, adaxial surfaces with 2 prominent ridges separated by a groove, reddish-brown.

= 40.

= 20, 40, 42.