Page authors: Don Knoke, David Giblin
Veratrum insolitum
siskiyou wild hellebore

Distribution: Occurring in the Columbia River Gorge in Washington; south-central Washington to northern California.

Habitat: Open prairies to thickets, and forested or open rocky slopes.

Flowers: July - September

Origin: Native

Growth Duration: Perennial

Conservation Status: Endangered in Washington (WANHP)

Pollination: Bumblebees, flies, wasps


Tall perennial herbs from thick rhizomes, the unbranched stems grey-wooly above, 10-17 dm. tall.


Leaves numerous, alternate, cauline, oblong-elliptic, up to 23 cm. long and 12 cm. broad.


Inflorescence a diffusely-branched panicle 2-5 dm. long, comprised of numerous grey-wooly racemes; pedicels 5-15 mm. long; perianth yellowish-white, saucer-shaped; tepals 6, distinct, broadly ovate, 6-9 mm. long, not clawed, somewhat fringed; stamens 6, equal to the tepals.


Capsule 2-3 cm. long, oblong-ovoid, woolly.

Accepted Name:
Veratrum insolitum Jeps.
Publication: Fl. Calif. 1: 266. 1921.

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Veratrum insolitum in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Veratrum insolitum checklist entry.

OregonFlora: Veratrum insolitum information.

E-Flora BC: Veratrum insolitum atlas page.

CalPhotos: Veratrum insolitum photos.

USDA Plants: Veratrum insolitum information.

12 photographs:
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