This wildflower is so rare and precious that the location is kept secret - even from me! I do know it is growing on private property in northern Sonoma County. But we are lucky that Massomeh Roberts photographed it so we can enjoy looking at it here.
Last year Craig Tooley photographed the group of these Trilliums a little earlier in their development, showing the younger white blossoms.
Thanks to Craig and Massomeh for allowing me to share their photos with you here.