Book excerpt: The 15000 plants featured in this encyclopedia have been selected by consultants from the UK, North America and Europe. They include not only tried and tested garden favourites, but also a selection of unusual species and cultivars. The plants are arranged alphabetically by botanical name. Common names are cross-referenced throughout, enabling plants to be found easily, even if the botanical name is unfamiliar. Synonyms are similaly cross-referenced. The introduction describes and explains the A-Z section, including detailed features on the plant kingdom, plant nomenclature, types and shapes. Basic concepts of hardiness, cultivation and propogation are set out in straightforward language. The A-Z section consists of individual descriptions of 15000 plants. Plants are arranged alphabetically by botanical name, with an introduction for each genus, as well as background data on the botanical family, geographical origin, native habitat, the range of plants within the genus and any unusual qualities. Symbols show the basic shape of all treees featured, while more detailed illustrations help to explain the range of flower shapes, leaf types and habitats within a particular group.