Dysphania ambrosioides (L.) Mosyakin & Clemants

Annual aromatic herb to c. 1 m tall; stems branched, glandular-scaly, puberulent (hairs septate), occasionally all glabrous. Petiole c. 3–25 mm long; lamina 2.5–13 × 1–5 cm, lanceolate, narrow-ovate or elliptic, usually deeply serrate-dentate, glabrous or puberulent, dotted with sessile glands below; base cuneate; apex acute or subacute. Infls long-paniculate, axillary or terminal, efarinose; cymes (glomerules) in sessile clusters along branches; infl. lvs subtending cymes small, linear to oblanceolate, entire or sinuate. Perianth segments 0.5–1 mm long, valvate or slightly imbricate, glabrous or puberulent, green with narrow hyaline margin, not keeled on back. Fr. incompletely invested by perianth; pericarp easily removed. Seed horizontal or vertical, 0.6–0.9–(1.2) mm diam., subglobose to subreniform; margins rounded; testa glossy dark brown, smooth.

[From: Webb et al. (1985) Flora of New Zealand. Volume 4 as Chenopodium ambrosioides L.]