The Cuban endemic genera Ariadne, Mazaea, Acunaeanthus, Phyllomelia (Rondeletieae), and Eosanthe (Rubiaceae)

After detailed morphological comparison, the genera Mazaea (incl. Neomazaea ) and Ariadne are considered to be synonymous, for which a new combination, M. shaferi, is provided. Acunaeanthus is maintained as a separate monotypi c genus. Phyllomelia, previously treated as genus incertae sedis, is here t ransferred to the Rondeletieae, and believed to be closely related to Mazae a. The systematic position of Eosanthe remains dubious until fertile collec tions become available. Complete descriptions, synonymies, typifications, a nd distributions of Mazaea, Acunaeanthus, Phyllomelia, and Eosanthe are pre sented, and Mazaea and Phyllomelia are illustrated.