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Medicinal plants are considered as a rich resource of ingredient for the use in drug development either pharmacopoeial, non-pharmacopeial or synthetic drug (Khare, 2007). It is the use of plants for medicinal purposes, and the research of such uses that form tha basis of many drug discoveries (Zahid, 2016). Many plants are considered as vital source of nutrition and as a result they are recommended for their therapeutic values (Khare, 2007). Natural products are those chemical organic substances which generally originate in nature and are produce by living organism (Chintoju, 2015). It can also produce either naturally synthesis or semi-synthesis process which play an important role in medicinal chemistry for delivery the target in drug discovery process and drug development. Chemically, the natural product also contains various types of compounds such as terpenoids, peptides, proteins, carbohydrates, amino acids, nucleic acid, lipids, polyketides and so forth. Therapeutic efficacy of medicinal plant depends both on quality and quantity of chemical constituents (Chopra, 1956). Wrong identification of natural product or herbal medicines lead to misuse of it (Chintoju, 2015) These is due to common error, i.e. the vernacular name is given to two or more than two or more entirely different species. These entire main problems can be solved by the pharmacognostic studies of plant materials. Asteraceae is the vast plant family which roughly comprises of 1500 genera and 2500 species in different habitat (Souza and Lorenz, 2012). Ageratum is one of the genera which belong to the family Asteraceae and consist 30 species (Okunade, 2002). Among the species, Ageratum conyzoides L. is commonly known as billy goat weed in English words “a geras” meaning non-aging and conyzoides from “Konyz” Mizoram Science Congress 2018 (MSC 2018)

Pharmacognostic profile of the leaf of Ageratum conyzoides