Created for the in-field or at-home use, this guide is an easy-to-use resource that covers every common tree in western North America--from the eastern base of the Rocky Mountains to the Pacific Coast. Learn how to recognize trees you see every day by their bark; fruits, flowers, or nuts; branching patterns; and overall appearance. Both beginning and advanced botanists will benefit from these tips for identification throughout a tree's lifespan and in every season of the year.