Blooms: May-August
Habit: herb
Duration: perennial
Origin: Native
Conservation Status: Abundant; of no concern.

Distribution: Widely distributed throughout the forested areas of Washington; Alaska south to California, east to Alberta, Idaho and Montana.
Habitat: Moist woods and stream banks, sea level to mid-elevations in the mountains.

Species Description:

General: Herbaceous perennial from slender rhizomes, the flowering stems 2-3.5 dm. tall, glandular-pubescent.
Leaves: Basal leaves with petioles 2-3 times as long as the blades; leaf blades highly variable, cordate, 1.5-8 cm. long and up to 12 cm broad, trifoliate and the leaflets deeply divided, or trifoliate and the leaflets shallowly lobed, or palmately 3- to 5 lobed; cauline leaves few and reduced.
Flowers: Inflorescence an elongate, leafless panicle; calyx bell-shaped, irregular, the 5 lobes longer than the tubular section, the upper lobe the largest; petals 5, white, linear, similar to the filaments; stamens 10, the filaments opposite the petals much shorter that the alternate 5.
Fruits: Ovary superior; carpels 2, unequal, 3-5 mm. and 7-10 mm. long respectively.

Subspecies & Varieties:

Tiarella trifoliata L.

Treated in Flora of the PNW as:

PNW Herbaria Specimens: View list of Tiarella trifoliata specimens in the Consortium of Pacific Northwest Herbaria database.

WTU Herbarium Specimens: View list of Tiarella trifoliata specimens in the WTU Herbarium database.

Washington Flora Checklist: Tiarella trifoliata treatment.

E-Flora BC: Tiarella trifoliata atlas page.

CalPhotos: Tiarella trifoliata images.

USDA Plants Database: Tiarella trifoliata.