Winter twigs

"Winter Twigs is a guide for wintertime identification of the deciduous plants of northwestern Oregon and western Washington (many of the species covered are also found in British Columbia and Alaska). For more than forty years, it has been used to identify plants during the months that they lack the leaves and flowers that most field guides rely on. Intended for use by teachers, students, scientists, amateur botanists, and outdoor enthusiasts, Winter Twigs provides the information necessary to identify all of the native deciduous woody plants likely to be encountered in the region, as well…