Synopsis This compact book contains information accumulated bibliographically on Indian Plants which are used as substitute or adulterant to various indigenous and foreign drugs, beverages, oils, woods, fibres, soap and rubber, etc. The book has two main chapters. In the first chapter under the heading "Plants described" about 335 plants have been included with their botanical names, family and English and Hindi names. A short description, distribution and remarks are also given. The chapter second includes 14 appendices wherein about 200 substitute and adulterant plants of betelnuts, belladonna, boxwood, chirata, coffee, digitalis, ipecac, gentian root, opium, quinine, rubber, soap, tea and tobacco are listed separately. More than 200 illustrations have been presented for identification.