Distribution: Occurring in scattered locations on both sides of the Cascades crest, but not likely persisting anywhere; occurring sporadically in other areas of North America.

Habitat: Illegal plantings in forest openings, roadsides, wastelots, and other disturbed areas, where escaping from cultivation.

Flowers: June-September

Origin: Introduced from Asia

Growth Duration: Annual

Conservation Status: Not of concern

Pollination: Wind

Dioecious, annual herbs from a taproot, the stems erect, 0.2-6 m. tall, simple to well-branched.

Leaves palmately compound, with petioles 2-7 cm. long; blades of leaflets 3-9, linear to linear-lanceolate, 3-15 cm. long and 0.2-1.7 cm. wide, the margins serrate, the surfaces with yellowish-brown, resinous dots.

Staminate inflorescences paniculate, erect, with numerous flowers; sepals 5, greenish, ovate to lanceolate, 2.5-4 mm. long; stamens 5, opposite the sepals; pistillate flowers on congested pseudospikes, sessile, enclosed by glandular, beaked bracteoles; perianth appressed to the base of the ovary.

Achenes ovoid, 2.5 mm. long, white or greenish, mottled with purple.