Page authors: Ben Legler, David Giblin
Agrostemma githago
common corncockle

Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; Alaska to California, east across most of North America to the Atlantic Coast.

Habitat: Roadsides and wasteland.

Flowers: June-July

Origin: Introduced from Europe

Growth Duration: Annual

Conservation Status: Not of concern

Pollination: Self-pollination, flies


White-hairy annual from a taproot, the simple to freely-branched stem up to 10 dm. tall.


Leaves all opposite, cauline, linear-lanceolate, 5-12 cm. long and 3-7 mm. wide.


Flowers few to several in an open inflorescence, terminal on the main and lateral stems; pedicels stout, 5-15 cm. long; calyx tube 12-16 mm. long, strongly 10-ribbed, the 5 lobes linear to lanceolate, 20-40 mm. long; petals 5, red, twice as long as the calyx tube; stamens 10; styles 5.


Capsule about equal to the calyx tube.

Accepted Name:
Agrostemma githago L.
Publication: Sp. Pl. 1: 435. 1753.

Synonyms & Misapplications:
Lycnhis githago (L.) Scop.
Additional Resources:

PNW Herbaria: Specimen records of Agrostemma githago in the Consortium of Pacific Northwest Herbaria database

WA Flora Checklist: Agrostemma githago checklist entry

OregonFlora: Agrostemma githago information

E-Flora BC: Agrostemma githago atlas page

CalPhotos: Agrostemma githago photos

25 photographs:
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