This study reduces five names to synonymy of Solanum andreanum, a variable taxon distributed from southern Colombia to central Ecuador. Two of the five names here united are recognized in Hawkes's latest taxonomic treatment in 1990, and one name was published after that treatment. The species have been distributed among five separate taxonomic series. We believe that this synonymy is only one example of a much larger problem of synonymy in sect. Petota. Solanum L. sect. Petota Dumort., the potato and its wild relatives, is taxonomically difficult. This