Flora of North America species comparison

30-75 cm, erect, glabrous below.

45-60 cm, erect, often glandular below the nodes, sometimes viscid.

mostly glabrous, hairy at the apices, hairs to 4 mm;

ligules 0.2-0.3 mm;

blades 10-25(40) cm long, 1-5 mm wide, involute, glabrous abaxially, scabridulous adaxially, sometimes also sparsely pilose.

often viscid, sometimes sparsely pilose, hairy at the apices, hairs to 6 mm;

ligules 0.2-0.3 mm;

blades 8-25 cm long, 2-4 mm wide, flat to involute, glabrous, sometimes viscid.

(3)5-30 cm long, 1-15 cm wide, from narrowly oblong, glomerate, and interrupted below to ovate and open;

primary branches 0.5-12(16) cm, appressed or diverging up to 40° from the rachises, stiff;

pulvini glabrous or sparsely hairy;

pedicels 0-1(3) mm, appressed, flattened.

20-35(42) cm long, 10-22 cm wide, broadly ovate, open, bases included in the uppermost leaf sheaths;

primary branches 5-14 cm, diverging 20-90° from the rachises, capillary, sometimes viscid, naked basally;

pulvini hairy, hairs to 6 mm;

pedicels (1)1.5-12 mm, diverging or appressed.

6-16(23) cm long, 2.4-5 mm wide, ovate to linear-elliptic, flattened, stramineous, with reddish-purple margins or completely reddish-purple, with 10-45 florets;

disarticulation basipetal, florets falling intact and before the glumes.

(2.5)3-4.8 mm long, 0.9-1.4 mm wide, linear-lanceolate, reddish-purple, with 4-9 florets;

disarticulation basipetal, glumes persistent.

ovate-lanceolate to lanceolate, membranous;

lower glumes 1.7-3 mm;

upper glumes 2.2-4 mm, apices acuminate;

lemmas 2-6 mm, ovate, membranous to leathery, apices usually acuminate or attenuate, sometimes acute;

paleas 1.5-3 mm, membranous to leathery, narrower than the lemmas, apices obtuse, sometimes bifid;

anthers 2, 0.2-0.5 mm, brownish.

lanceolate, membranous;

lower glumes 0.9-1.2 mm;

upper glumes 1-1.3 mm;

lemmas 1.1-1.4 mm, ovate to lanceolate, membranous, 3-veined, apices acute;

paleas 1-1.4 mm, hyaline, not wider than the lemmas, apices obtuse;

anthers 3, 0.2-0.3 mm, purplish.

0.8-1.3 mm, ellipsoid, somewhat laterally flattened, smooth, reddish-brown.

0.5-0.6 mm, ellipsoid, terete in cross section, neither ridged nor grooved, faintly striate, reddish-brown.

= 40.

= unknown.