Abstract
Coleocephalocereus Backeb. (Cactaceae) is composed of 8 species, being a relatively small genus in the family, exclusive distribution to Brazil. The genus has a history of nomenclatural and typification problems, with about 37 names, including validly published names, names, illegitimate names, and non-validly published names. Studies with phylogenetic data for a tribe are scarce, and onl…