[Wikipedia] Distribution, Description, Conservation: Calochortus dunnii is a rare species of flowering plant in the lily family known by the common name Dunn's mariposa lily. Distribution The plant is endemic to the Peninsular Ranges, native to southern San Diego County, California; and northern Baja California state, Mexico. It is known from only a few occurrences in chaparral, grassland, and Closed-cone coniferous forest habitats, at 185 - 1,830 feet (56 - 558 m) in elevation in the Cuyamaca Mountains, Laguna Mountains, and others.[2][3] Conservation Although the plant isn't seriously impacted by any one major problem,[1] the main threat to the existence of this rare species is collecting by admirers of the attractive flowers.[4] (link added by Mary Ann Machi)