Abstract
Pharmacognosy is the study of naturally occurring biological substances, principally those derived from plants, that find use in medicine. The word 'pharmacognosy' is derived from the Greek 'pharmacon', 'a drug' and gignosco, 'to acquire knowledge of'. It is closely related to both botany and plant chemistry and, both originated from the earlier scientific studies on medicinal plants. As late as the beginning of the 20th century, the subject had developed mainly on the botanical side, being particularly concerned with the description and identification of drugs, both in the whole state and in powder and with their history, commerce, collection, preparation and storage. Such branches of pharmacognosy are still of fundamental importances, but rapid development in other areas, particularly phytochemistry and pharmacology, have enormously expanded the subject. As a result it is now possible to approach the study of medicinal plants from the botanical, phytochemical and pharmacological view points (Trease and Evams, 14th ed., 1997). Undoubtedly, the plant kingdom still holds many species of plants containing substances of medicinal value which have yet to be discovered; large numbers of plants are constantly being screened for their possible pharmacological value.
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Corresponding Author
Dr Raman Ranjan
MD (ay), AMO, GAD, Raigarh
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.,7354018299
DOI: https://dx.doi.org/10.18535/jmscr/v5i9.25
