Page author: David Giblin
Boykinia occidentalis
coastal brookfoam

Distribution: West of the Cascades crest in Washington; British Columbia south to California.

Habitat: Moist woods and along streams, lowlands and along the coast.

Flowers: June-August

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern


Herbaceous perennial from rhizomes, the slender stem 1.5-6 dm. tall, covered with reddish-brown, soft hairs, usually glandular above.


Leaves long-petioled below becoming sessile above, the stipules of several long, brownish bristles from a short, broad base; leaf blades cordate, 2-6 cm. broad, 5-7 cleft nearly half their length, the segments irregularly toothed.


Inflorescence an open panicle, densely glandular and reddish; calyx 4-5 mm. long, the 5 lanceolate, glabrous lobes one-half as long as the glandular tube; petals 5, white, spatulate-oblanceolate, 5-6 mm. long, short clawed, deciduous.


Ovary half inferior, carpels 2; seeds ellipsoid, 0.5-0.6 mm. long, purplish black.

Accepted Name:
Boykinia occidentalis Torr. & A. Gray
Publication: Fl. N. Amer. 1: 577. 1840. 1840.

Synonyms & Misapplications:
Boykinia cincinnata (Rosend. & Rydb.) Fedde
Boykinia elata (Nutt.) Greene [HC]
Boykinia vancouverensis (Rydb.) Fedde
Therofon cincinnatum Rosend. & Rydb.
Additional Resources:

PNW Herbaria: Specimen records of Boykinia occidentalis in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Boykinia occidentalis checklist entry.

E-Flora BC: Boykinia occidentalis atlas page.

CalPhotos: Boykinia occidentalis photos.

USDA Plants: Boykinia occidentalis information.

42 photographs:
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