'Based on material contained in J.C. Willis: "A dictionary of the flowering plants and ferns" (6th edition, 1931)'. - Extends and updates the more general information omitted from later editions.
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A dictionary of useful and everyday plants and their common names by F. N. Howes. ISBN 0521085209. Published by Cambridge University Press in 1974. Publication and catalogue information, links to buy online and reader comments.
