Hyperacanthus (plant)

Hyperacanthus is a flowering plant genus in the family Rubiaceae, occurring on Madagascar and nearby southern Africa, approximately from Mozambique to the southernmost parts of the continent.

This genus used to contain only 5 species, but the number has tripled since a number of plants formerly believed to be genip-trees – the "Genipa sensu Drake" group – were recognized to be not as closely related to genips as was previously believed. Those species are now placed in Hyperacanthus, at least provisionally:
 * Hyperacanthus ambovombensis Rakotonas. & A.P.Davis
 * Hyperacanthus amoenus (Sims) Bridson
 * Hyperacanthus exosolenius (formerly in Genipa, tentatively placed here)
 * Hyperacanthus grevei Rakotonas. & A.P.Davis
 * Hyperacanthus lantzianus (formerly in Genipa, tentatively placed here)
 * Hyperacanthus lastellianus (formerly in Genipa, tentatively placed here)
 * Hyperacanthus madagascariensis (Lam.) Rakotonas. & A.P.Davis (formerly in Genipa)
 * Hyperacanthus mandenensis Rakotonas. & A.P.Davis
 * Hyperacanthus microphyllus (K.Schum.) Bridson
 * Hyperacanthus perrieri (Drake) Rakotonas. & A.P.Davis (formerly in Genipa)
 * Hyperacanthus pervillei (Drake) Rakotonas. & A.P.Davis (formerly in Genipa)
 * Hyperacanthus poivrei (Drake) Rakotonas. & A.P.Davis (formerly in Genipa)
 * Hyperacanthus ravinensis (Baill. ex Drake) Rakotonas. & A.P.Davis (formerly in Genipa)
 * Hyperacanthus talangninia (DC.) Rakotonas. & A.P.Davis (formerly in Genipa)
 * Hyperacanthus tubulosus (formerly in Genipa, tentatively placed here)