Isonema
Isonema is a genus of plant in the 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