This book having title "Standardization Techniques of Herbal Medicines" written with an intention to benefit the Diploma, UG and PG students. It seemed to us appropriate in this to also take into consideration those crude substances of the vegetable kingdom possessing an organic structure which receive technical application. On the other hand, zoology has now been but incidentally considered, for the reason that pharmacognosy has to treat of only a very limited number of animal substances. In the morphological portion, which has experienced a complete transformation, we have endeavored to give a brief sketch of the most important phenomena, whereby the technical expressions in present use have received explanation. Same applies to the selection of examples from anatomy and morphology. Pharmacognostic study the active and other constituents of drugs, such as may be obtained in crystalline form from sections, from extractions of small quantities of powders, or from a few drops of an extracted solution as obtained in assay work. While there are a number of books treating of micro-chemistry, yet the treatment of the microscopic crystals in these is of a general character. The work, here presented will doubtless at once indicate the aim and the scope of the science of pharmacognosy, and clearly demonstrate its intimate connection on every hand with chemical, botanical, macroscopical and microscopical science, as also the impulse afforded for the further investigation of points of historic interest and a more extended knowledge of the geographical or climatic and commercial relations of vegetable products in their varied applications, either as medicinal remedies, as food, or in the arts. The authors welcome suggestions and comments for improvement of the book. We are thankful to publishers and extend our thanks to supportive friends, colleagues and for bringing out nicely printed book.