Catharanthus coriaceus

References

1. [1]Protabase - Plant Resources of Tropical Africa. — http://www.prota.org ↩︎An excellent on-line database with detailed information on over 3,200 species of useful plants of Africa.
2. [2]Flore de Madagascar et des Comores — Humbert H. · Museum National D'Histoire Naturelle; Paris · 1946 - 1984 · http://www.biodiversitylibrary.org/ ↩︎Written in French, an excellent flora of the area though it has not been completed. Available for download from the Internet.
3. [3]African Flowering Plants Database — Conservatoire et Jardin Botaniques. · http://www.ville-ge.ch/musinfo/bd/cjb/africa/recherche.php ↩︎Contains information on over 150,000 plant names (including synonyms) giving a description and habitat, plus a distribution map.