Page authors: Don Knoke, David Giblin
Aruncus dioicus
sylvan goatsbeard

Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska to California, east to Alberta, also in the eastern half of North America.

Habitat: Moist forest and forest edge from low elevations to the subalpine.

Flowers: May-July

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern


Dioecious, rhizomatous, perennial herbs, the several glabrous stems 1-2 m. tall.


Leaves numerous, mostly cauline, long-petiolate, reduced upward from imperfectly triternate-pinnatifid below to ternate-pinnatifid above; leaflets ovate to oblong-lanceolate, pointed, up to 15 cm. long and 8 cm. broad, sharply twice-serrate.


Inflorescence a large terminal panicle of numerous spike-like, racemose branches; calyx 1.5-2 mm. broad, the 5 triangular lobes spreading; petal 5, white, about 1 mm. long in the pistillate flowers; staminate flowers with 15-20 stamens.


Follicles 3 mm. long.

Accepted Name:
Aruncus dioicus (Walter) Fernald
Publication: Rhodora 41: 423. 1939.

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Aruncus dioicus in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Aruncus dioicus checklist entry.

OregonFlora: Aruncus dioicus information.

E-Flora BC: Aruncus dioicus atlas page.

CalPhotos: Aruncus dioicus photos.

USDA Plants: Aruncus dioicus information.

34 photographs:
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