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.
Flowers: March-June
Origin: Native
Growth Duration: Perennial
Conservation Status: Not of concern
[none provided]
PNW Herbaria: Specimen records of Trillium crassifolium in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Trillium crassifolium checklist entry
OregonFlora: Trillium crassifolium information
E-Flora BC: Trillium crassifolium atlas page
CalPhotos: Trillium crassifolium photos