Serially propagated Cinchona ledgeriana and C. succirubra (Rubiaceae) leaf, root and unorganized suspension cultures established from germinated seeds were studied for quinine and quinidine production. Leaf organ cultures were grown and subcultured in Murashige and Skoog's Revised Tobacco Medium supplemented with benzyladenine; root organ cultures were grown on the same medium supplemented with indolebutyric acid; and unorganized suspension cultures were grown on the same medium supplemented with 2,4-dichlorophenoxyacetic acid and benzyladenine. On a dry weight basis, leaf organ cultures of C. ledgeriana contained 0.06 % quinine and 0.05 % quinidine and of C. succirubra contained 0.04 % quinine and 0.04 % quinidine. No quinine and quinidine were detected in either root organ or unorganized suspension cultures. © 1981.