Pharmacognosy

Pharmacognosy is the study of medicinal drugs derived from plants or other natural sources. The American Society of Pharmacognosy defines pharmacognosy as "the study of the physical, chemical, biochemical and biological properties of drugs, drug substances or potential drugs or drug substances of natural origin as well as the search for new drugs from natural sources. It is also defined as the study of crude drugs. It can be said that pharmacognosy is closely related to botany, plant chemistry, microbiology and pharmacology. Today pharmacognosy can be divided to three main field ::

• Ethnopharmacognosy
• Phytotherapy
• Phytochemistry