Phialanthus is a genus of flowering plants in the family Rubiaceae. There are about 20 species, 17 of which occur in Cuba.Motley, T. J., Wurdack, K. J., & Delprete, P. G. (2005). Molecular systematics of the Catesbaeeae-Chiococceae complex (Rubiaceae): flower and fruit evolution and biogeographic implications. American Journal of Botany, 92(2), 316-329.
Species include: Phialanthus acunae Phialanthus alainii Phialanthus bissei Phialanthus ellipticus Phialanthus glaberrimus Phialanthus grandifolius Phialanthus guantanamensis Phialanthus hispaniolae Phialanthus inflatus Phialanthus jamaicensis Urb. Phialanthus linearis Phialanthus macrocalyx Phialanthus macrostemon Phialanthus marianus Phialanthus myrtilloides Phialanthus oblongatus Phialanthus parvifolius Phialanthus peduncularis Phialanthus resinifluus Phialanthus revolutus Urb. Phialanthus rigidus Phialanthus stillans
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