. . . . . "Isonema is a genus of plant in family Apocynaceae first described as a genus in 1810. It is native to Africa.Species Isonema buchholzii Engl. - Nigeria, Cameroon Isonema infundibuliflorum Stapf - Cameroon, Gabon, Zaire Isonema smeathmannii Roem. & Schult. - W Africa (Ghana, Guinea, Guinea-Bissau, Ivory Coast, Liberia, Senegal, Sierra Leone)\u2191 1.0 1.1"@en . . . .