The Plant-book: A Portable Dictionary of the Vascular Plants Utilizing Kubitzki's The Families and Genera of Vascular Plants (1990-), Cronquist's An Integrated System of Classification of Flowering Plants (1981), and Current Botanical Literature, Arranged Largely on the Principles of Editions 1-6 (1896/97-1931) of Willis's A Dictionary of the Flowering Plants and Ferns
^D. J. Mabberley (1997). The Plant-book: A Portable Dictionary of the Vascular Plants Utilizing Kubitzki's The Families and Genera of Vascular Plants (1990-), Cronquist's An Integrated System of Classification of Flowering Plants (1981), and Current Botanical Literature, Arranged Largely on the Principles of Editions 1-6 (1896/97-1931) of Willis's A Dictionary of the Flowering Plants and FernsISBN 9780521414210 (revised Dec 2015)