This book is an essential reference tool for all those who have a passion for trees as well as those who work in tree-related professions whether they be garden managers, forest and country park wardens, foresters, woodland managers or those working in the fields of arboriculture and horticulture. Moreover, this volume is also intended to be a textbook of trees aimed at arboriculture, horticulture and forestry students studying at National Diploma and Higher National Diploma levels and for candidates of the Royal Horticultural Society's Diploma in Horticulture and the Society's Master of Horticulture [RHS] Award.