Flora of North America species comparison

erect to ascending, unbranched, 2.5–7.5 dm, somewhat viscid and farinose.

nonaromatic;

petiole 1–12 cm;

blade triangular to broadly hastate, 4.5–10 × 3–9 cm, base truncate, cordate, or hastate, margins entire, apex acute (acuminate), adaxially sparsely farinose.

dense glomerules sessile on terminal and axillary spikes, spikes 5–19 cm;

glomerules 3–5 mm diam., flowers developing at about same time;

bracts absent.

perianth segments connate into 0.4–0.6 mm tube, lobes oblong or elliptic, 0.8–1.5 × 0.5–1.1 mm, apex obtuse, rounded or truncate, scarcely abaxially keeled throughout, glabrous, not covering fruit at maturity;

stamens (4–)5;

stigmas 2–4.

obovoid;

pericarp adherent, ± smooth.

obovoid or rotund, 1.5–2 mm in diam. margins not rounded;

seed coat black, rugose.