Trillium ovatum
trillium, white trillium, western wake-robin
Petals change to pink or purple as they age.
WTU specimens
Other herbaria

Distribution: Widely distributed in the forested areas of Washington; British Columbia south to California, east to Montana and Idaho; also in Colorado and Wyoming.

Habitat: Open to dense moist forests at low to mid-elevations, often where boggy in the spring.

Flowers: March-June

Origin: Native

Conservation Status: Not of concern

Description:
General:

Glabrous perennial herbs from short, thick rhizomes, the flowering stem 1-3 dm. tall.

Leaves:

Leaves usually 3, whorled, at the top of an otherwise naked stem; leaves not mottled, sub-sessile, broadly ovate to deltoid-obovate, 5-15 cm. long and broad, pointed.

Flowers:

Flowers solitary, stalked, the peduncle 2-8 cm. long; sepals 3, green, narrowly oblong, 1.5-6 cm. long; petals 3, white, longer than the sepals and much wider; stamens 6, filaments 3-6 mm. long, anthers 6-14 mm. long, cream colored.

Fruit:

Fruit a fleshy capsule, yellowish, slightly winged.

Identification Notes:

T. ovatum is distinguished from our other Trilliums by its stalked flowers and sessile unmottled leaves. The leaves form a single whorl of 3 below the solitary flower.

Accepted Name:
Trillium ovatum Pursh
Publication: Fl. Amer. Sept. 1: 245. 1814.

Synonyms & Misapplications:
(none provided)
Infraspecies:
var. ovatum – trillium, white trillium, western wake-robin
Additional Resources:

PNW Herbaria: Specimen records of Trillium ovatum in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Trillium ovatum checklist entry.

E-Flora BC: Trillium ovatum atlas page.

CalPhotos: Trillium ovatum photos.

USDA Plants: Trillium ovatum information.

82 photographs:
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