Page authors: Ben Legler, David Giblin
Atocion armeria
sweet William catchfly

Distribution: Occurring in scattered locations west of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.

Habitat: Wastelots, roadsides, and other disturbed areas.

Flowers: June-July

Origin: Introduced from Europe

Growth Duration: Annual

Conservation Status: Not of concern


Glabrous annual 1-7 dm. tall.


Leaves opposite, sessile and somewhat clasping, the lower oblanceolate, becoming lanceolate above, 2-5 cm. long and 0.5-1.5 cm. wide.


Flowers several to many in a flat-topped inflorescence; calyx narrowly tubular, 5-lobed, 13-17 mm. long, 10-nerved, glabrous; petals 5, pink, the claw 6-8 mm. long, the blade obovate, truncate, 4-7 mm. long; blade appendages 2, linear, 2-3 mm. long; stamens 10, styles 3.


Capsule 3-celled.

Accepted Name:
Atocion armeria (L.) Raf.
Publication: Autik. Bot. 29. 1840.

Synonyms & Misapplications:
Silene armeria L. [FNA5, HC]
Additional Resources:

PNW Herbaria: Specimen records of Atocion armeria in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Atocion armeria checklist entry.

E-Flora BC: Atocion armeria atlas page.

CalPhotos: Atocion armeria photos.

USDA Plants: Atocion armeria information.

8 photographs:
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