Page authors: Don Knoke, David Giblin
Chelidonium majus
devil's milk, swallow wort
Specimens
Photos

Distribution: Occurring chiefly west of the Cascades crest in Washington; southern British Columbia to Oregon, east to Montana; also in eastern North America.

Habitat: Moist to dry woods, roadsides, fields, waste areas.

Flowers: May-July

Origin: Introduced from Eurasia

Growth Duration: Biennial

Conservation Status: Not of concern

Pollination: Bees, flies

Description:
General:

Nearly glabrous perennial, the stems branching, ribbed, to 10 dm. tall.

Leaves:

Basal leaves in a rosette; cauline leaves alternate, up to 35 cm. long with petioles 2-10 cm. long; leaf blades deeply 5-9 lobed, the margins irregularly dentate.

Flowers:

Inflorescence a terminal umbel, the peduncle 2-10 cm. long, pedicles 5-35 mm. long; sepals 2, distinct, up to 1 cm. long; petals 4, bright yellow, obovate to oblong, up to 2 cm. wide; flowers 20-25 mm. in diameter; stamens 12-many; style 1 mm. long.

Fruits:

Capsules linear to narrowly oblong, 2-5 cm. long, glabrous

Accepted Name:
Chelidonium majus L.
Publication: Sp. Pl. 1: 505. 1753.

Synonyms & Misapplications:
Chelidonium majus L. var. majus [FNA, KZ99, AJ]
Additional Resources:

PNW Herbaria: Specimen records of Chelidonium majus in the Consortium of Pacific Northwest Herbaria database

WA Flora Checklist: Chelidonium majus checklist entry

OregonFlora: Chelidonium majus information

E-Flora BC: Chelidonium majus atlas page

CalPhotos: Chelidonium majus photos

15 photographs:
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