Rediscovery of Salvia dugesiana (Lamiaceae) in Guanajuato, Mexico, after 129 years

Abstract

A wild population of Salvia dugesiana is recorded for the first time after 129 years since the last collections made of the species. It was known only in base to two different gatherings with imprecise localities by Alfred A. D. Dugès in 1880 and 1894. The taxon was detected by a photograph published in an online website for citizen science, iNaturalist. The population was found in southern Guanajuato, in tropical deciduous forest. The species is akin to S. karwinskii (sect. Holwaya). A lectotype was designated, and a detailed description, photographs and distribution map are presented. Additionally, an identification key to Mexican Salvia species with red or orangish corollas is provided, which helps to contrast S. dugesiana against the rest of Mexican species with these colors in their corollas.