Indiarubber tree, leaves of, 31, ~20~ Insects and flowers, 83 Iodine, 11 Iron chloride, 16 Iron, importance of, 17 Ivy, adventitious roots of, 56, ~40~ Ivy, climbing of, 106, ~101~ Ivy as host plant, 112, ~109~ Ivy, leaves of, 65 Ivy, position of leaves of, 37, ~26~ L Lake or pond-maps, 193 Lamina of leaf, 64, ~50~ Laminarias, 175, ~149~ Larch, branching of, 59, ~44~ Larch, family of, 127 Larch, seed-scales of, 128, ~124~ Larch, tufts of leaves of, 76, ~67~ Leaves, 64 Leaves, arrangement as regards light, 36, ~25~, 37, ~26~ Leaves, arrangement on stem, 68 Leaves, compound, 65, ~51~ Leaves, form of, 64, ~50~ Leaves, “Mosaic,” 37 Leaves, no growth without CO_{2}, 20 Leaves, simple, 64, ~50~ Leaves, veins of, 67, ~55~ Lenticels of, 96, ~96~ Life, signs of, 4 Light, 35 Light from one side, 35, ~23~, 36, ~24~ Light, influence on position of leaves, 36, ~24~, ~25~ Light, influence on size of leaves, 38, ~27~ Light, influence of, in formation of starch in leaves, 24 Lime-tree, stem of, 94, ~95~ Lime-water, 6, ~2~, 20, ~12~ Linear leaves, 66 Liverworts, 140, ~132~ Louse-wort, 113 M Magnesium sulphate, 15 Maize, seeds of, 10, ~5~ Maize, seedlings of, 10, ~5~, 13, ~8~ Maps of plants, 188 Marram grass (~see~ Sandgrass), 166, ~145~ Mistletoe, 112, ~108~ Monkshood, 119, ~118~ Monocotyledons, 126 Moorland, 153, ~140~, 184 Moss, 138, ~130~ Moss in bogs, 156 Moss, capsule of, 139, ~131~ Moss, spores of, 140 Movement caused by light, 36, ~24~ Movement of minute plants, 48 Movement of sensitive plants, 46, ~33~, ~34~, ~35~ Movement of plants in sleep, 46, ~32~ Movement of tendrils, 45, ~31~ N Nasturtium, movement of leaves, 36, ~24~ Nasturtium, shape of leaves, 65, ~52~ Nasturtium, twining of petioles, 106, ~103~ Needle leaves, 66, ~53~ Nepenthes, 117, ~115~ Nitrogen, 19 Nucleus of cells, 92, ~91~ Nurse leaves (~see~ Cotyledons) O Oak, branching of, 59, ~43~ Orchid, roots of, 57, ~41~ Ovate leaves, 65 Oxygen, 19, 21, ~13~, 22 P Palm, 57, ~42~ Palmate leaves, 66 Parasites, 109 Pea-flowers, 86, ~80~ Pea-fruits, 87, ~81~ Pea-pod (~see~ Pod) Pea-tendrils on leaf, 107, ~104~ Pea-tendrils, movement of, 45, ~31~ Peat, 155, 179 Peltate leaves, 65, ~52~ Petals, 80, 121, ~121~, ~122~ Petiole, 64, ~50~ Petiole, twining of, 107, ~103~ Physical geography, 182 Pine-cones, 128, ~123~ Pine-family, 127 Pine-leaf, 66, ~53~ Pine-seeds, 129, ~125~ Pine-seedlings, 129, ~126~ Pitcher plants, 117, ~115~ Plantation of trees, 155 Pod of pea, 87, ~81~ Pollen, 81, 120, 127 Pollination, 83, 118 Pollination, arrangements to ensure cross-, 120, ~120~ Pond-maps, ~see~ Lake Ponds, 159, ~Pl. V.~ 185, ~154~, ~155~ Poppy, ~Pl. II.~ Poppy capsule, 89, ~85~