Page author: David Giblin
Ozomelis trifida
three-toothed mitrewort

Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Alberta, Idaho, and Montana.

Habitat: Moist forests, moderate to mid-elevations in the mountains.

Flowers: May-July

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern


Slender herbaceous perennial from rhizomes, the several leafless flowering stems 1.5-3.5 dm. tall, glandular-puberulent above, often with 1-2 tiny, membranous bracts.


Leaves all basal, long-petiolate, the blades cordate to cordate-ovate, 2-6 cm. broad and about as long, indistinctly 5-7 lobed, the lobes with shallow, rounded teeth.


Inflorescence an elongate raceme, 10-20 flowered, blossoming upwards; pedicels thick, 0.5-2 mm. long; calyx broadly cup-shaped, 1.5-3.5 mm. long, the lobes oblong to ovate, whitish- or purplish-tinged; petals white or purplish tinged, rhombic to oblanceolate, usually trifid, with a wedge-shaped base narrowed to a long claw; stamens 5, opposite the calyx lobes.


Ovary half inferior; carpels 2.

Accepted Name:
Ozomelis trifida (Graham) Rydb.
Publication: N. Amer. Fl. 22: 95. 1905.

Synonyms & Misapplications:
Mitella trifida Graham [FNA8, HC]
Mitella trifida Graham var. trifida [KZ99]
Mitella trifida Graham var. violacea (Rydb.) Rosend. [KZ99]
Mitella violacea Rydb.
Ozomelis anomala (Piper) Rydb.
Ozomelis micrantha (Piper) Rydb.
Additional Resources:

PNW Herbaria: Specimen records of Ozomelis trifida in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Ozomelis trifida checklist entry.

E-Flora BC: Ozomelis trifida atlas page.

CalPhotos: Ozomelis trifida photos.

USDA Plants: Ozomelis trifida information.

49 photographs:
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