Chenopodium ambrosoides

Sirken

Annual, rarely short-lived perennial, up to 1·2 m, strongly aromatic, pubescent , with many sessile glands. Leaves usually lanceolate, entire, dentate or rarely laciniate. Inflorescence paniculate; cymes sessile along the ultimate branches, usually bracteate. Calyx not saccate or net-veined; sepals free in at least upper ½ rounded dorsally. Seeds 0·5-0·8 mm in diameter. 2n = 32. Cultivated as a vermifuge, and naturalized throughout much of W., C. & S. Europe. Tropical America