This Kew classic is an augmented edition of William Stearn’s classic monograph on Epimedium published in 1938. Retaining the unmistakable stamp of scholarship and accessibility that characterised all his work, it is an essential botanical reference and a practical handbook for gardeners. Part I is a detailed taxonomic treatment of Epimedium and Vancouveria including cultivars, plus chapters on habit, classification, morphology, cultivation and geographical distribution; Part II covers Caulophyllum, Ranzania, Jeffersonia, Leontice and other herbaceous Berberidaceae; and Part III is Julian Shaw’s revision of Podophyllum. With 27 botanical paintings, 31 line drawings and 77 colour photographs.