Sp. Pl. 1: 220. 1753.
Stems erect or ascending, branching from base, to 4 dm, white-mealy. Leaves strongly malodorous; petiole 0.8–0.9 cm; blade ovate or rhombic, 0.8–1.6 × 0.6–1.5 mm, base rounded to cuneate, margins entire, apex acute, densely mealy abaxially, glabrescent adaxially. Inflorescences small glomerules in terminal panicles and axillary spikes; glomerules subglobose, 0.4 mm; bracts absent. Flowers: perianth segments 5, connate into 0.5 mm tube; lobes deltate, 0.5–0.7 × 0.6–0.7 mm, apex acuminate, rounded abaxially, farinose, covering fruit at maturity; stamens 5; stigmas 2, 0.2 mm. Achenes depressed-ovoid; pericarp adherent, smooth. Seeds lenticular, oval, 0.9–1.2 mm diam.; seed coat black, smooth. 2n = 18.
Phenology: Fruiting fall.
Habitat: Disturbed, weedy areas
Elevation: 100-800 m
Introduced; Calif., Del., Fla., Ind., Md., Mich., Mo., N.Y., Pa.