RetanillaRetanilla is a genus of flowering plants in the family Rhamnaceae, native to Chile, Peru, and Argentina. The species in this genus are actinorhizal plants.TaxonomyRetanilla comprises the following species:Retanilla ephedra Brongn.Retanilla patagonica TortosaRetanilla stricta Hook. & Arn.Retanilla trinervia Hook. & Arn.