Douglasia conservatorum Björk is described as a new species from a single population in the Coeur d'Alene Mountains along the Idaho/Montana border in the United States. With other members of the genus, it shares a pink corolla color, branched and stellate trichomes, and pulvinate habit. Within Douglasia Lindl., it is unique in possessing papillae on the leaves, and additionally differs in its combination of traits of leaf shape, flower number, shape of the involucre bracts, and distribution and morphology of trichomes. Its morphology and range suggest that it is related to other temperate-climate Douglasia species, in contrast to all species in the northern, (sub)Arctic center of diversity. A key to Douglasia is presented. Like all other members of the genus, D. conservatorum is endemic to a small geographic range. The ecology and conservation priority of the species are discussed.