Page authors: Don Knoke, David Giblin
Actaea laciniata
cut-leaved bugbane, Mt. Hood bugbane

Distribution: Occurring west of the Cascades crest in southwestern Washington; southwestern Washington to adjacent northwestern Oregon.

Habitat: Moist woods at middle elevations in the mountains.

Flowers: June-August

Origin: Native

Growth Duration: Perennial

Conservation Status: Sensitive in Washington (WANHP)


Herbaceous perennial from a woody rhizome, the stems often hollow, 8-15 dm. tall, sparsely puberulent.


Leaves alternate, nearly tri-ternate, the leaflets broadly lanceolate, acute to rounded at the base, coarsely serrate-dentate and irregularly lobed.


Inflorescence large, paniculate, loosely flowered; pedicles 2-10 mm. long, often exceeding the flowers; sepals 5, 4-5 mm. long, pale, early-deciduous; petals often present, 5 mm. long, cream-colored, acutely bi-lobed; stamens numerous, cream-colored, the outer 5 often broad and petaloid; pistils 3-5.


Follicles 10-14 mm. long, narrowed to a stipe 4-6 mm. long

Accepted Name:
Actaea laciniata (S. Watson) J. Compton
Publication: Taxon 47(3): 621. 1998.

Synonyms & Misapplications:
Cimicifuga laciniata S. Watson [FNA3, HC]
Additional Resources:

PNW Herbaria: Specimen records of Actaea laciniata in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Actaea laciniata checklist entry.

E-Flora BC: Actaea laciniata atlas page.

CalPhotos: Actaea laciniata photos.

USDA Plants: Actaea laciniata information.

7 photographs:
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