Manchester :University Press ;1915. | Harvard University Botany Libraries

London: Chatto and Windus, 1884.

Cambridge : at the University Press 1935

Cambridge : at the University Press 1937

Cambridge : at the University Press (Cambridge: printed by John Clay, M.A. at the University Press) 1913

Cambridge,University Press1913. | New York Botanical Garden, LuEsther T. Mertz Library

Cambridge, University Press, 1913.