Synopsis The third volume in the series of the Treatise on Indian Medicinal Plants incorporates one hundred and twenty one species of dicotyledonous flowering plants belonging to twenty seven families. The same features and pattern of presentation of the earlier volumes have been maintained. Only the well-characterized chemical constituents have been included with the parts they have been isolated from wherever available. As before, each plant has been illustrated either by a coloured photograph or a line sketch. In order to make the volume self-contained, the basic concepts, glossaries of various terms used, the books referred to, the indices of plant species and common vernacular names of the earlier volumes have been repeated along with new additions wherever necessary.