Two subspecies are recognized: holosericeus (Linnaeus, 1758), which occurs on Puerto Rico and in the Lesser Antilles (except for Grenada); and chlorolaemus (Gould, 1857), which is endemic to Grenada. The two subspecies are similar, and the differences between them are not well described. However, chlorolaemus, the subspecies on Grenada, has a darker green throat with broad dark blue-violet coloration on the breast (Schuchmann 1999).
Linnaeus, 1758, Lesser Antilles. At present, this species is described as part of a primarily lowland clade that includes the caribs, violet-ears, and a number of distinct relatives (Androdon aequatorialis, Heliothryx barroti, Doryfera ludovicae) (Bleiweiss et al 1997, McGuire et al. 2009). Sometimes placed in monotypic genus Sericotes, on basis of more naked tarsi, rounded tail, and different coloration, but more recently placed in Eulampis with the other carib species.
Other common names: Emerald-throated Carib/Hummingbird, Green Doctor Bird, Green Carib.