Barbara Pickersgill (born 1940) is a British botanist with a special interest in the domestication of crops, the genetics, taxonomy, and evolutionary biology of cultivated plants, and the preservation of crop diversity. Her 1966 dissertation for the degree of Doctor of Philosophy from Indiana University concerned the taxonomy of Capsicum chinense. Her doctoral advisor was Charles B. Heiser. In 2005 she retired from the School of Biological Sciences at the University of Reading, to become an Honorary Research Associate. Her research projects include: