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Passerina L. is an endemic southern African genus, with the exception of two species that have outliers in eastern Africa. The genus comprises about 20 species and four subspecies. P. quadrifaria Bredenkamp and Van Wyk is a new species occurring in the Karoo Mountain, Langeberg and Southeastern phytogeographic centres of the Cape Floristic Region. It is most closely related to P. comosa C.H.Wright...