Distribution: Introduced in much of the United States
Habitat: Illegal plantings in openings in the forests
Flowers: June - September
Conservation Status: Not of concern
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.