Page author: David Giblin
Triantha occidentalis
western asphodel, western tofieldia

Distribution: Occurring in the Olympic and Cascade mountains in Washington; British Columbia to California.

Habitat: Moist meadows, bogs and streambanks, mid- to high elevations in the mountains.

Flowers: June-August

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Bees, beetles


Perennial herbs from short rhizomes, the stems 1-5 dm. tall, glandular-hairy above and in the inflorescence.


Leaves mostly in a basal tuft, linear, 5-15 cm. long; stem leafless or with 2-3 sheathing leaves.


Flowering stem leafless, erect, and covered with sticky, glandular hairs used to trap and digest insects (carnivory); inflorescence a congested terminal raceme; pedicels in groups of 3 with involucre-like bracts at the tips.


Tepals 6, distinct, white or slightly greenish, oblong-obovate, 3-5 mm. long; stamens 6, slightly exceeding the tepals; styles 3, short, distinct.


Fruit a membranous capsule, 4-9 mm. long including the persistent styles.

Accepted Name:
Triantha occidentalis (S. Watson) R.R. Gates
Publication: J. Linn. Soc., Bot. 44: 137. 1918.

Synonyms & Misapplications:
(none provided)
Additional Resources:

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

WA Flora Checklist: Triantha occidentalis checklist entry.

OregonFlora: Triantha occidentalis information.

E-Flora BC: Triantha occidentalis atlas page.

CalPhotos: Triantha occidentalis photos.

USDA Plants: Triantha occidentalis information.

35 photographs:
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