Pinguicula warijia sp. nov. (Lentibulariaceae), a newly rediscovered species from the Sierra Obscura, northern Mexico

An undescribed species of Pinguicula (Lentibulariaceae), first collected in 1972 was recently rediscovered in the Arroyo Babarocos canyon, located in the Sierra Obscura region, in the municipality of Uruachi, Chihuahua, Mexico. This plant is described and illustrated as Pinguicula warijia. The taxon is compared with the related species P. oblongiloba and P. zamudioana, and a key to the species of P. section Orcheosanthus of western Mexico is provided, along with photographs, distribution map, and taxonomic discussion.