who discovered pharmacognosy?

Answers:
Monroe Wall, a medicinal chemist, had worked for almost 20 years in the plant-screening program at a regional U.S. Department of Agriculture office in Philadelphia. By 1960, after establishing a national reputation in plant chemistry, Wall was approached by RTI's Hugh Hunter to form and lead the RTI Natural Products Laboratory (NPL) and secure the promise implicit in natural products research: find cancer-fighting medicines in nature.

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