Five genera of Portulacaceae are reviewed and reduced to three, one of which (Avonia) is new. Grahamia is expanded to include Talinaria, Talinopsis and Xenia and two species previously included in Anacampseros from Australia and Argentina. Collectively these form the new Tribe Anacampseroteae. Greater emphasis on vegetative characters produces a classification recognising three dissimilar life forms and harmonising better with the geographical spread of the 29 species involved.