Flora of North America species comparison

10-130 cm, erect, sometimes geniculate, glabrous, sometimes with a ring of glandular depressions below the nodes.

75-100 cm, erect, glabrous.

sometimes with glandular pits, pilose near the apices and on the collars, hairs to 4 mm, papillose-based;

ligules 0.2-0.5 mm, ciliate;

blades 5-25 cm long, 2-7(9) mm wide, flat, abaxial surfaces glabrous, adaxial surfaces scabridulous, occasionally pubescent near the base.

hirtellous on the margins when immature, apices glabrous or hairy shorter than 0.5 mm;

ligules 0.2-0.3 mm;

blades 20-40 cm long, 2-5(6) mm wide, flat to involute, glabrous abaxially, scabrous adaxially.

(5)10-40 cm long, (2)4-18 cm wide, ovate, rachises angled and channeled;

primary branches 3-12(15) cm, solitary to whorled, appressed or diverging to 80° from the rachises;

secondary branches somewhat appressed;

pulvini glabrous;

pedicels 1-6(7) mm, almost appressed to narrowly divergent, stiff.

22-40 cm long, 0.3-0.6 cm wide, spikelike, dense;

primary branches shorter than 1.2 cm, closely appressed, spikelet-bearing to the base;

pulvini glabrous;

pedicels 0.1-0.6 mm, mostly appressed, hirtellous.

(4)5-10(11) mm long, 0.7-2.4 mm wide, ovate to linear-lanceolate, gray-green to purplish, with 5-11(15) florets;

disarticulation acropetal.

1.4-2.2 mm long, 0.9-1.2 mm wide, ovate, stramineous to light greenish, with 2-3 florets;

disarticulation basipetal, in the rachilla below the individual florets or at the base of the florets, glumes persistent.

subequal, 0.7-2(2.3) mm, ovate to lanceolate, membranous;

lemmas 1.2-2.4 mm, ovate, membranous, glabrous or with a few hairs, gray-green, lateral veins evident, often greenish, apices acute;

paleas 1-2.2 mm, hyaline, keels scabrous, apices obtuse to truncate;

anthers 3, 0.2-0.5 mm, purplish.

elliptic to ovate, hyaline, keels ciliolate;

lower glumes 0.7-1 mm;

upper glumes 0.9-1.3 mm, apices obtuse;

lemmas 1.5-2.1 mm, ovate, membranous to hyaline, apices acute to obtuse;

paleas 1.1-1.6 mm, hyaline, not wider than the lemmas, apices obtuse;

anthers 2, 0.3-0.4 mm, reddish-brown.

0.5-0.8(1) mm, ovoid to rectangular-prismatic, laterally compressed, shallowly to deeply grooved on the adaxial surface, striate, reddish-brown, distal 2/3 opaque.

0.7-1 mm, ellipsoid, somewhat ventrally flattened, smooth to faintly striate, reddish-brown.

= 60.

= 40.