There is lot of adulteration and substitution of herbal raw materials, especially in case of bark drugs. Different plant materials are being sold in the market under the same vernacular, for example 'Asoka' - Saraca Asoca is the genuine plant species but bark of other plant taxa are being mixed up and sold or used under the name 'Asoka'. It is also apparent that after drying, it is very difficult to differentiate the bark of the same genus, as in ...
