Leaf mouths, function of, 146, 159, 160, 171-173. perspiration of, 148, 149. Leaflets, defined, 168. Leafstalk, use of, 115. a bud protector, 131. defined, 136. Leaves, 135-185. protection of, 126, 127. buds on, 132, 133. parts of, 135-137. edges of, 135, 136, 168. functions of, 145. perspiration of, 146, 149, 150, 170-173. as storehouses, 150. position of, 160, 161. shapes of, 161, 167, 168. effect on roots, 162. net-veined, 165, 166. parallel-veined, 166. covering on, 170-175. hairy, 170-172, 175. woolly, 172. as traps, 176-183. fall of, 184, 185. color change of, 185. Life everlasting, 171, 172. Life substance of plants (protoplasm), 140, 141. Lily, classified, 88. underground stem of, 123, 150. flower leaves of, 191. plan of, 191, 192. pollen of, 196. pistil of, 197, 198. development of, 199. coloring of, 226. Lily, Easter, plan of, 191, 218, 219. Lily family, 45, 219. Liverwort, 203, 219. Locust leaf, 168. M Mallow, stamens of, 195. Mangrove, fruit and stem of, 92-94. Maple, keys of, 86, 210. winged seed of, 61, 86. seed leaves of, 90. branch of, 126. buds of, 129. leaf of, 136, 165, 167. flower of, 210. Maple, red, 92, 127. Maple, silver, 210. Maple, sugar, 92, 210. Maple, swamp, 210. Marsh marigold, a spring flower, 203. plan of, 218. pistils of, 219. Midrib of leaf, 137. Milkweed, pod of, 35, 95. seedbox of, 57. seeds of, 61. Mistletoe, 110, 111. Monocotyledonous plants (plants with one seed leaf), 88. Morning-glory, seed leaves of, 78. seed of, 83, 90. development of, 112, 113. stem of, 114, 115, 117, 123. Mountain laurel, buds of, 129. arrangement of stamens of, 226, 227. Mullein leaves, 170, 175. N Nasturtium spur, 226. Nepenthes leaf, 178, 179. Nettles, 175. Net-veined leaves, 165, 166. Nightshade, enchanter’s, 195. Nightshade, garden, 115. Nourishment of plant, 150. O Oak, seed of, 68. root of, 145. leaf of, 167. Oat seed, a food, 91. Orchid family, 107, 223, 224. Orchids, 123, 223, 224, 226. Ovary, see “seedbox.” P Palm tree, trunk of, 121. Pansy, plan of, 220. Parallel-veined leaves, 166. Parasitic plants, 108-111. Parsley family, 247. Partridge berries, 45, 46, 51. Partridge vine, 46, 184, 231. Pea, seed of, 80, 87, 90, 242. seed leaves of, 87. stem of, 115. pod of, 241, 242. Pea blossom, stamens of, 194, 241, 242. pistil of, 200, 241, 242. analysis of, 240-242. Pea family, 54, 240. Peach, compared with apple, 36. blossom of, 38. Persian origin of, 40. buds of, 129. Pear, compared with apple, 31. blossom of, 32. buds of, 129. Pear, wild, 118. Peony seeds, 75, 76. Perspiration of plants, 148, 149, 160.