[Wikipedia] Range, Naming, Ecology: Erythronium hendersonii, or Henderson's fawn lily, is a plant in the lily family native to southwestern Oregon, and northern California.[2] It can be locally very abundant within its range which is in the Rogue River, and Applegate River drainage basins in Josephine County and Jackson County in Oregon, and well as sites in Siskiyou, Del Norte, and Mendocino Counties in California.[3][4] This species is named for Louis F. Henderson, who has been called "The Grand Old Man of Northwest Botany". Ecology It blooms early in the southern part of its range starting in February, with some locations carpeted by E. hendersonii in the thousands in March, where it often blooms with Dodecatheon hendersonii. It blooms at higher elevations through May. It is most abundant in dry, open woodlands of Ponderosa pine, Garry oak, and madrone. (link added by Mary Ann Machi)