Phylogenetics of (Cactaceae) on Hispaniola: clarifying species limits in the complex and a new species from the Sierra de Bahoruco.

The Antillean genus represents an radiation among the Greater and Lesser Antilles of 19 currently recognized species. Extensive fieldwork carried out in the Dominican Republic over recent years has revealed that the species limits of of Hispaniola are more complex than previously thought. There are four currently recognized species that occur on the island, , , and .