The plant-book a portable dictionary of the higher plants ; utilising Cronquist's An integrated system of classification of flowering plants (1981) and current botan. literature arranged largely on the principles of ed. 1 - 6 (1896/97 - 1931) of Willis's A dictionary of the flowering plants and ferns - Mabberley, David J. 1948- (Cambridge Univ. Pr., 1993)