Firewood and timber felled during the period of the German occupation fall to the State.
Hybridization also is very uncertain, and is very difficult to carry out effectually; hence the method of propagating the best varieties by cuttings has been adopted, except in the case of those which do not strike readily, as in C. Ledgeriana, in which the plants are grown from the shoots of felled trees.
Calisaya, known as the calisaya of Santa Fe, was strongly recommended for cultivation, because the shoots of felled trees afford bark containing a considerable amount of quinine; C. Pitayensia has been introduced into the Indian plantations on account of yielding the valuable alkaloid quinidine, as well as quinine.
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