Alphabetical by author,  books with a # symbol, denotes the link is to a digitised online version

Brice-Ytsma, H., and Watkins, F., 2014 Herbal exchanges: In celebration of the National Institute of Medical Herbalists 1864-2014. London: Strathmore Publishing.

De Cleene, M., & Lejeune M., 2003. Compendium of Symbolic and Ritual Plants in Europe:  Ghent: Man and Culture Publishers.

Erichson-Brown, C., 1979. Medicinal and other uses of North American Plants. New York: Dover Publications.

O’Sullivan, C., (Ed.). 2005. Reshaping Herbal Medicine Knowledge, Education and Professional Culture. Philadelphia: Elsevier.