Flora of North America species comparison

30-75 cm, erect, glabrous below.

25-80 cm, erect, glabrous and shiny below the basal nodes.

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.

sparsely hairy at the apices, hairs to 6 mm;

ligules 0.2-0.4 mm;

blades 6-30(52) cm long, 2-4.5 mm wide, flat, abaxial surfaces glabrous, adaxial surfaces scabridulous, sometimes with a few scattered hairs near the base.

(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.

(25)30-60 cm long, 15—45 cm wide, broadly ovate to obovate, open, diffuse;

primary branches mostly 5-25(32) cm, diverging 20-90° from the rachises, capillary;

pulvini hairy;

pedicels (4)10-35(50) mm, widely diverging, capillary, all the pedicels on each branch longer than the spikelets.

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.

4-18 mm long, 1.4-3 mm wide, linear-lanceolate, grayish-green or stramineous to purplish, with (6)9-30 florets;

disarticulation acropetal, below the lemmas, paleas 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.

narrowly lanceolate, membranous;

lower glumes 1.1-3.4 mm;

upper glumes 1.6-3.4 mm, apices acuminate;

lemmas 1.8-4.4 mm, lanceolate, membranous, lateral veins evident to inconspicuous, sometimes greenish, apices acute to acuminate;

paleas 1.1-3.5 mm, hyaline to membranous, narrower than the lemmas, apices obtuse;

anthers 2, 0.3-0.8 mm, purplish or brownish.

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

0.6-0.8 mm, ovoid to ellipsoid, finely striate, reddish-brown.

= 40.

= unknown.