Flora of North America species comparison

erect, spreading, or clambering, much-branched, glabrous or sparsely villous.

erect, largely simple proximal to inflorescences, villous or glabrous.

opposite;

blade ovate to lanceolate, 3–14 × 1.5–7 cm, glabrous or villous.

opposite;

blade ovate to elliptic, 6–15 × 2–7 cm, apex acute to long acuminate, sparsely pubescent.

panicles, 10–40 cm;

bracts and bracteoles 1/3–2/3 as long as tepals.

panicles 7–30 cm;

bracts and bracteoles of staminate and pistillate flowers shorter than tepals.

pedicellate;

tepals whitish to stramineous, oblong, 0.6–0.8 mm, hyaline, apex obtuse or rounded, densely villous.

tepals white, ovate, 1–1.3 mm, hyaline, apex acute to acuminate, densely lanate.

0.5–0.7 mm.

0.5–0.8 mm.

included in tepals, greenish, ovoid, 0.6–0.8 mm, apex obtuse.

exerted from tepals, greenish white, ovoid, 1.1–1.5 mm, apex rounded.