•First publication of its kind for the region•Comprehensive guide to all 693 tree genera of New Guinea •Written by Kew experts •Scientifically accurate descriptions for each genus given, accompanied by extensive colour photographs and line drawings •Each group has a family description and key to the New Guinea tree genera, followed by a description of each genus, notes on taxonomy, distribution, ecology and diagnostic characters•Features keys and family/generic descriptions for family circumscriptions previously unrecognised•Content organised using Angiosperm Phylogeny Group 3 classification system•Essential companion to anyone studying or working in the region, including botanists, conservation workers, ecologists and zoologists