Origin: Native
Conservation Status: Not of concern
[none provided]
Occurring west of the Cascades crest in Washington; Washington to California.
Occurring west of the Cascades crest in Washington; lowland western Washington to Willamette Valley, Oregon.
Occurring east of the Cascades crest in the Wenatchee Mountains and in the Blue Mountains; central Washington, and in Idaho eastern Oregon.
Occurring chiefly west of the Cascades crest in Washington; British Columbia to California.
Occurring east of the Cascades crest in Washington; Washington to northeastern Oregon, east to Idaho.
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.PNW Herbaria: Specimen records of Trillium in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Trillium checklist entry
OregonFlora: Trillium information
E-Flora BC: Trillium atlas page
CalPhotos: Trillium photos