Synopsis The dictionary includes brief description of medicinal herbs used in alternative systems of healing. The plants have been arranged alphabetically and families, names, parts used, chemistry and medicinal use discussed. Formulations prepared from medicinal plants used in Indian system of medicine have been included. The salient feature of the dictionary is a brief account of pharmacological studies on plants extracts and constituents isolated from them. At the end of the text, five annexures have been included explaining: Investigative work done on some medicinal plants; Standardized herbal extracts prepared from some medicinal herbs; List of phytochemicals; List of recently studied plant based drugs with actions and Drugs of controversial origin used in Ayurveda.