How to use this guide for identifying trees -- Southern South America and the term 'Patagonia' -- Geology, climate, and soils of Patagonia -- Vegetation of Patagonia -- What is a tree? -- Flowering plants and their divisions -- Characteristic features of gymnosperms (conifers) -- Characteristic features of angiosperms -- Dicots and monocots -- Keys to groups of trees -- Genera and species of gymnosperms -- Genera and species of dicots -- Genera and species of monocots -- Afforestations with Pinaceae in zones of transition -- Fruit trees in Los Antiguos and Chile Chico - Lake Buenos Aires / General Carrera -- Trees in urban landscapes -- National parks, forest reserves, and regional reserves of Southern Argentina and Chile -- Carl Skottsberg's "modest expedition" - A look at the scientific discovery of Patagonia -- Glossary of technical terms -- Abbreviations -- Literature. This book is a guide to the native trees and approximately 95% of the introduced arboreal species of Argentine and Chilean Patagonia. Introductory chapters convey an overview on what is termed 'Patagonia', as well as on the geology, climate, soils, and vegetation of Southern South America. Keys based on vegetative characters and richly illustrated descriptions of more than 170 species form the core of the manual. These chapters are followed by concise entries on afforestations, urban trees, and plantations of fruit trees in climatic enclaves. Renowned experts describe the most important National Parks of both Argentine and Chilean Patagonia. The last chapter is devoted to Carl Skottsberg and his remarkable expedition through Patagonia a hundred years ago.