Trillium
trillium, wake-robin
5 species
1 subspecies and varieties
1 subspecies and varieties
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Trillium albidum – giant 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
Growth Duration: Perennial
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
Growth Duration: Perennial
• ssp. parviflorum – small-flowered trillium
Trillium crassifolium – thick-leaved trillium, thick-leaved wake-robin
Distribution: Occurring east of the Cascades crest in the Wenatchee Mountains and in the Blue Mountains; central Washington, and in Idaho eastern Oregon.
Habitat: Open woods vegetated rock outcrops.
Origin: Native
Flowers: March-June
Growth Duration: Perennial
Distribution: Occurring east of the Cascades crest in the Wenatchee Mountains and in the Blue Mountains; central Washington, and in Idaho eastern Oregon.
Habitat: Open woods vegetated rock outcrops.
Origin: Native
Flowers: March-June
Growth Duration: Perennial
Trillium ovatum
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California.
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
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California.
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
Trillium petiolatum – purple trillium, purple wake-robin
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
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
Trillium stenosepalum – western white trillium, western wake-robin
Distribution: Occurring east of the Cascades crest in eastern Washington; south-central British Columbia and southwestern Alberta to central Idaho and western Montana, disjunct in Wyoming and Colorado.
Habitat: Moist woods.
Origin: Native
Flowers: April-July
Growth Duration: Perennial
Distribution: Occurring east of the Cascades crest in eastern Washington; south-central British Columbia and southwestern Alberta to central Idaho and western Montana, disjunct in Wyoming and Colorado.
Habitat: Moist woods.
Origin: Native
Flowers: April-July
Growth Duration: Perennial
