trillium, wake-robin
3 species
2 subspecies and varieties
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Trillium albidumgiant trillium, sessile trillium
Distribution: Occurring west of the Cascades crest in Washington; Washington to California.
Habitat: Moist forests, oak-ash woodlands, thickets, and fields at low elevations.
Origin: Native
Flowers: April-June
ssp. parviflorum – small-flowered trillium
Trillium ovatumtrillium, white trillium, western wake-robin
Distribution: Widely distributed on both sides of the Cascades crest in forested areas in Washington; British Columbia to California, east to Montana, Wyoming, and Colorado.
Habitat: Open to dense moist forests at low to mid-elevations, often where boggy in the spring.
Origin: Native
Flowers: March-June
Growth Duration: perennial
var. ovatum – western white trillium, western wake-robin
Trillium petiolatumpurple trillium, purple wakerobin
Distribution: Occurring east of the Cascades crest in Washington; Washington to northeastern Oregon, east to Idaho.
Habitat: Stream banks, moist meadows, forest edge, and thickets at low to middle elevations in the mountains.
Origin: Native
Flowers: April-June
Growth Duration: perennial