Hatchet-leaved Arbor-vitæ, 194. Haw, Black, 114. Summer, 106. Yellow, 106. Hawthorn, Black, 106. Dotted-fruited, 106. English, 104. Pear, 106. Tall, 105. Hazel, 149. Hazelnut, 149. Heart-leaved Alder, 148. Willow, 165. Heath Family, 116. Heavy-wooded Pine, 174. Hemlock, Common, 182. Ground, 199. Japan, 182. Mountain, 182. Hercules'-Club, 109. Hibiscus, 71. Hickory, Big Shellbark, 142. Broom, 143. Shagbark, 142. Shellbark, 142. Swamp, 143. White-heart, 142. Himalayan Spruce, 181. Hoary Alder, 147. Holly, 77. Holly Family, 77. Honey-locust, 95, 96. Honeysuckle Family, 113. Hop-hornbeam, 150. Hop-tree, 74. Hornbeam, 151. Horse-chestnut, 81, 82. Horse-sugar, 122. Hovenia, 80. Idesia, 67. Ilex, 77, 78. Ilicineæ, 77. Imperial Paulownia, 127. Indian Bean, 128. Cedar, 190. Irish Juniper, 199. Iron-wood, 150. Japan Arbor-vitæ, 196. Cedar, 198. Hemlock, 182. Larch, 188. Lilac, 126. Magnolia, 65. Maple, 88. Persimmon, 120. Planer-tree, 136. Pine, 176. Podocarpus, 201. Silver Fir, 184. Storax, 120. Jersey Pine, 177. Judas-tree, 94. Juglandaccæ, 140. Juglans, 140, 141. Jujube, 80. Juniper, 198, 199. Juniperus, 198, 199. Kalmia, 116. Katsura-tree, 67. Kentucky Coffee-tree, 95. Kiaka Elm, 136. Kilmarnock Willow, 166. Kingnut, 142. Koelreuteria, 83. Laburnum, 92. Lagerstroemia, 109. Lambert's Pine, 172. Larch, American, 188. European, 188. Golden, 189. Japan, 188. Large-flowered Magnolia, 63. Large-leaved Maple, 86. Large-toothed Aspen, 168. Large Tupelo, 113. Larix, 187-189. Lauraceæ, 130. Laurel, 116, 117. Laurel Family, 130. Laurel-leaved Willow, 165. Laurel-oak, 158. Lawson's Cypress, 196. Lebanon Cedar, 189. Leguminosæ, 92. Lilac, 126. Linden, 72, 73. Linden Family, 72. Lindera, 131. Liquidambar, 108. Liriodendron, 66. Live-oak, 155. Loblolly Bay, 70. Pine, 174. Locust, Bristly, 94. Clammy, 94. Common, 93. Honey, 95, 96. Lombardy Poplar, 169. Long-leaved Pine, 174. Willow, 167. Long-racemed Buckeye, 83. Lonicera, 115. Loosestrife Family, 108. Lythraceæ, 108. Maclura, 137. Madeira Nut, 141. Magnolia, Chinese White, 65. Great-leaved, 64. Japan, 65. Large-flowered, 63. Purple Japan, 66. Southern Evergreen, 63. Swamp, 63. Thurber's Japan, 66. Magnoliaceæ, 62. Magnolia Family, 62. Mallow Family, 71. Malvaceæ, 71.