The medicinal plants, Coutarea latiflora Sesse & Moc. ex. DC. (Hintonia latiflora Bullock) (Rubiaceae) and Exostema caribaeum (Jacq.) Roem. et Schult. (Rubiaceae) were examined for antimalarial properties. Among different crude solvent extracts of the stem bark, the hydrolysed ethyl acetate extracts