[oregonflora.org] Limited Range, Description, Intergrading: Subspecies wigginsii is a Klamath Mountains endemic that occurs widely along the county boundary between Del Norte and Siskiyou counties, California, and east through southeastern Josephine County, Oregon, to Mount Ashland in Jackson County (Ballantyne 1983). It intergrades with ssp. vollmeri near Grayback Mt. in Josephine County, and reaches its purest, most consistent expression high on Mt. Ashland in Jackson County. The solid orange flowers, broad perianth segments, yellow anthers, and wet-ground habitat are diagnostic. Genetic instability in this subspecies is frequently expressed as malformed flowers with shrunken or missing reproductive structures. (link added by Mary Ann Machi)