Isonema
Isonema is a genus of plant in the family Apocynaceae first described as a genus in 1810. It is native to Africa.
;SpeciesIsonema buchholzii Engl. - Nigeria, Cameroon Isonema infundibuliflorum Stapf - Cameroon, Gabon, Zaire Isonema smeathmannii Roem. & Schult. - W Africa