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The pharmacognostic studies on the stem barks of four species of Cinnamomum viz. Cinnamomum zeylanicum Blume, C. camphora Nees & Eberm., C. tamala Fr. Nees & C. iners Reinw. have been made. Macroscopic and microscopic characters and the characters of the powders of each bark have been studied and the authentic diagnostic characters of each bark were noted down in the table. These will remove confusion in proper identification of the market samples and will also help in checking adulterations.
Chaudhurai et al. (Mon,) studied this question.