Some taxonomic clarifications in Vanilla subgenus Xanata (Orchidaceae), and the resurrection of Vanilla calyculata - Flanagan, Nicola S.; Navia-Samboni, Andres; Vargas, William G.; Díaz-Rueda, Daniel Mauricio; Cruz, José Yader Sageth Ruiz; Pansarin, Emerson Ricardo; Castaño, Alejandro (Kew Bulletin, 2025)