Abstract
Anthurium idimae is described from Espírito Santo and Rio de Janeiro states, in Southeastern Brazil. During the floristic survey of Araceae family in the Atlantic Forest, we found an unknown species with an intriguing combination of intermediate characteristics among A. cleistanthum, A. truncatum, A. molle, and A. cachoeirense. We described and illustrated the new species, including a comparative analysis of characters that distinguishes it from similar species, and also provide comments about its ecology, distribution and conservation.