Page author: Don Knoke
Perideridia oregana
squaw-potato
WTU specimens
Other herbaria

Distribution: Western Washington to northern California, in and west of the Cascades.

Habitat: Moist to dry meadows and open slopes or flats, from the valleys to well up in the mountains.

Flowers: June - August

Origin: Native

Conservation Status: Historical in Washington (WANHP)

Description:
General:

Slender, glabrous perennial from a tuberous-thickened, edible, bundle of roots, the solitary stem 3-6 dm. tall.

Leaves:

Leaves several, well distributed along the stem, the blade once pinnate or ternate; the ultimate segments elongate and narrow.

Flowers:

Inflorescence of terminal and 1-several lateral compound umbels, the umbels 2.5-7 cm. wide; rays up to 6 cm. long at maturity; involucre of a few, narrow bracts; involucel of well-developed, bristly bractlets 0.6-1.0 mm. wide; calyx teeth well developed; flowers white.

Fruits:

Fruit glabrous, oblong-ovate, longer than wide, 2.5-4 mm. long, with prominent ribs.

Accepted Name:
Perideridia oregana (S. Watson) Mathias

Synonyms & Misapplications:
Atenia oregana
Carum oregana
Additional Resources:

PNW Herbaria: Specimen records of Perideridia oregana in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Perideridia oregana checklist entry.

E-Flora BC: Perideridia oregana atlas page.

CalPhotos: Perideridia oregana photos.

USDA Plants: Perideridia oregana information.

11 photographs:
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