The dried bark of Cinchona Calisaya, Cinchona officinalis, Cinchona succirubra, Cinchona lancifolia, and other species of cinchona from which the peculiar alkaloids of the bark may be obtained.

B.P. Preparations.

Cinchoninae Sulphas.

Quininae Hydrochloras.

Cinchonidinae Sulphas.

„ Sulphas.

(Salts of quinine and cinchonine may also be obtained from some species of Remijia, DC.)