Flora of North America species comparison

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

45-95 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.

hairy at the apices and on the margins, hairs to 6 mm;

ligules 0.5-1.2 mm;

blades 7-30 cm long, 2.5-7 mm wide, flat to loosely involute, glabrous abaxially, scabrous adaxially, margins sharply scabrous.

(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.

10-30 cm long, 1-6 cm wide, oblong, condensed, interrupted below;

primary branches 1-11 cm, appressed or diverging to 40° from the rachises, naked basally;

pulvini glabrous;

pedicels 0.5-25 mm, with a narrow band or abscission line below the apices.

(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.

5.5-16 mm long, 2.7-9 mm wide, ovate, flattened, greenish to stramineous, sometimes with a reddish-purple tinge, with 4-22 florets;

disarticulation below the glumes, spikelets falling intact.

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.

equal, 3-4.5 mm, ovate, chartaceous;

lemmas 3-5 mm, broadly lanceolate, chartaceous to leathery, lateral veins green, apices acute;

paleas 3-5 mm, chartaceous to hyaline, keels broadly winged below, forming a wing or tooth on each side that often projects beyond the lemma bases, apices acuminate;

anthers 3, 1.4-2.8 mm, golden-yellow.

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.

1-2 mm, ellipsoid, adaxial surfaces flattened, reddish-brown.

= 60.

= 40.