Flora of North America species comparison

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

25-75 cm, erect, glabrous below the nodes.

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.

glabrous or with hairy apices, hairs to 4 mm;

ligules 0.1-0.3 mm, ciliate;

blades 4-8(18) cm long, 1-2 mm wide, involute, frequently deciduous, adaxial surfaces mostly glabrous, sometimes pilose near the base.

(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.

terminal and axillary;

terminal panicles 5-15 cm long, (1)2-10(12) cm wide, narrowly ovate, open;

axillary panicles 2-5 cm long, 0.3-0.6 cm wide, usually contracted and partially to completely enclosed by the subtending sheath;

primary branches 1-10 cm, appressed or diverging up to 90° from the rachises, wiry;

pulvini glabrous or hairy;

pedicels 0.3-5 mm, appressed, flattened.

(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.

6-15(27) mm long, 1.6-2.4 mm wide, ovate-lanceolate, plumbeous to greenish, often with a reddish-purple tinge, with 10-35(45) florets;

disarticulation acropetal, glumes first, then the lemmas, paleas 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.

lanceolate to ovate, membranous;

lower glumes 1.4-2.1 mm;

upper glumes 1.6-2.2 mm;

lemmas (1.7)2-2.5 mm, broadly ovate, leathery, apices acute to acuminate;

paleas 1.1-1.7 mm, hyaline, apices obtuse to truncate;

anthers 2, 0.3-0.7 mm, reddish-purple.

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.

0.5-0.6 mm, globose, not grooved, smooth, light reddish-brown.

= 60.

= 40.