Flora of North America species comparison

simple or more commonly branched throughout, mainly 2–8(–10) dm, branches mostly obtusely angled;

herbage scurfy, becoming glabrate.

slender to rather coarse, initially erect-ascending, finally spreading-ascending, scurfy when young.

alternate or proximalmost opposite, short petiolate proximally, sessile and often cordate-clasping distally;

blade ovate to deltoid or oval, 4–30(–40) × 3–30 mm, base truncate or subhastate to rounded, margin entire or dentate, apex acute to obtuse.

alternate except proximalmost ones, blade ovate to cordate-ovate, 5–15(–20) × 3–10(–13) mm;

base mostly cordate (to rounded), margin entire or denticulate, apex acute to attenuate, thickish and scurfy-tomentose.

in axillary glomerules.

of both sexes mixed in small axillary clusters.

in glomerules mainly in distal axils;

sepals 3–5.

in glomerules in distal axils, 4–5-merous.

brown, 1–2 mm wide.

deep red-brown, 1.5–1.8 mm.

bracteoles scarcely compressed, 2–3 mm and as wide, apex truncate to broadly rounded, with 3 (or more) teeth across summit, surfaces smooth (or rarely tuberculate).

bracteoles sessile or subsessile, round-ovate (semi-orbiculate) to deltoid-rhombic or flabellate, slightly compressed, 3–5 mm and as broad, united to middle, deeply toothed, margin with acute teeth, terminal tooth subequal to others or largest, thin and soft at margin, hard at center, scarcely though sometimes tuberculate on faces.

= 18.

= 36, 54.