ABSTRACT
The genus Lindernia All., as treated here, is represented in the New World by fourteen species. Six species are members of the Section Brachycarpae, five of which are postulated to be native in the New World. One native and one introduced species are in each of the sections Lindernia and Tittmannia. Old World introductions also include two species in Section Torenioides and one species each in sections Numularia and Bonnaya. Keys are provided to the fourteen species and four varieties that occur in the New World. Descriptions and distribution maps are included for the native taxa and most of the introduced species, and most are also illustrated. Nomenclatural changes include a new variety and new combinations for a species and a variety. Lindernia viscosa is reported for the first time in the New World.