Common Locust trees. _Robinia pseud-acacia_ 130 Honey Locust. _Gleditsia triacanthos_ 132 Kentucky Coffee tree. _Gymnocladus dioicus_ 134 Linden, Liquidamber, and Sassafras. (Colored plate) 140 American Linden. _Tilia americana_ 142 Liquidamber. _Liquidambar styraciflua_ 144 Sassafras. _Sassafras sassafras_ 146 Trunk of a Sassafras 148 Magnolia and Tulip tree. (Colored plate) 152 Tulip tree. _Liriodendron tulipifera_ 156 Catalpa. _Catalpa speciosa_ 158 Ailanthus. _Ailanthus glandulosa_ 160 Hercules’ Club. _Aralia spinosa_ 162 Mountain Ash. _Pyrus americana_ 166 A young Black Cherry tree. _Prunus serotina_ 170 White Willows. _Salix alba_ 176 Aspens. _Populus tremuloides_ 180 American Larch. _Larix americana_ 186 European Larch. _Larix europæa_ 188 INTRODUCTION When Miss Huntington told me last year that she was going to write a book about the trees in their winter aspects, knowing how conscientiously she had studied her subject and how successful she had been in imparting the results of her observation to others, I felt sure that she would do a useful and excellent piece of work, and that her book would be of real assistance to all persons who want to gain some knowledge of the trees which they pass in their daily walks. The promise of the book is now fulfilled, and nothing is left for the introductor to do but to call attention in a general way to the beauty of trees in winter and to the pleasure and profit of studying them at this season of the year, as well as when their branches are clothed with leaves or covered with flowers or fruits.