Page authors: Don Knoke, David Giblin
Allium crenulatum
scalloped onion

Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to Oregon.

Habitat: Forest openings and mountain meadows, moderate to high elevations.

Flowers: May-July

Origin: Native

Conservation Status: Not of concern


Scapose perennial from an obliquely ovoid bulb, the outer coats whitish or grayish, without a network pattern.


Leaves usually 2, flattened, somewhat curved, longer than the scape and deciduous at maturity; scape strongly flattened and two-edged, the margins often wavy.


Umbels several- to many-flowered, the pedicels about as long as the tepals; tepals 6, 6-12 mm. long, lanceolate, pointed, pinkish with deeper pink mid-veins; stamens 6, about the length of the tepals; anthers yellow or purplish.


Capsule 3-celled, obscurely crested.

Accepted Name:
Allium crenulatum Wiegand
Publication: Bull. Torrey Bot. Club. 26: 135, plate 355, fig. 1. 1899.

Synonyms & Misapplications:
Allium cascadense M. Peck
Allium vancouverense J. Macoun
Allium watsonii Howell
Additional Resources:

PNW Herbaria: Specimen records of Allium crenulatum in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Allium crenulatum checklist entry.

E-Flora BC: Allium crenulatum atlas page.

CalPhotos: Allium crenulatum photos.

USDA Plants: Allium crenulatum information.

51 photographs:
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