Trees of the northern united states and canada is the most complete book on the trees of northern north america ever published it features more than 300 species of trees and shrubs of the northern united states and canada 136 range maps of canada and the northern united states that show the territory of each species. This book which was developed from native trees of canada gives illustrated descriptions for more than 300 species of trees and large shrubs that are native commonly planted or naturalized in the northern usa and canada in order to help identification the trees are organized into 12 groups based on leaf shape and arrangement along the twig. Canada northern states trees united trees of the northern united states and canada christopher columbus in 1493 introduced citrus trees into america on the island of haiti by planting the seed of the sweet orange tree the sour orange citron lemon lime and pummelo fruit trees. Identifies in a full color guide more than 300 species of conifer and broadleaf trees found in the upper united states virginia to northern california and canada see more see less table of contents preface acknowledgments readers guide how to identify a tree the conifers. Trees of the northern united states and canada is the most complete book on the trees of northern north america ever published it features more than 300 species of trees and shrubs of the northern united states and canada 136 range maps of canada and the northern united states that show the territory of each species