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fall off whole or in parts.

11. Collect series of plants which are growing together in different places, e.g., those in a woodland glade, those at the edge of a pond, those on a sandy hill, and so on. Dry them by pressure between sheets of paper, and mount them, noting how their forms correspond to their surroundings.

12. Go to the same spot in a wood in spring, summer, autumn, and winter; make notes and drawings of what you see each time. In the spring there will be a carpet of flowers under the bare trees, note what happens in the summer, and later on.

These suggestions are only a beginning, and special problems will arise of their own accord in connection with the work you are doing, till you find that the real excursion becomes the most interesting and important part of your work. If we go to the plants themselves and ask them to teach us, they will never fail to give us the chance of learning lessons of ever-increasing interest.

INDEX

The roman numbers refer to the pages, and italicised numbers to the figures

A Absorption by roots, 33, 21, 22 Adventitious roots, 56, 40, 57, 41 Alcohol, 24 AlgΓ¦, 141 AlgΓ¦ in ditches, 151 AlgΓ¦ in the sea, 143, 134, 173 Ampelopsis, 108, 105 Animals eaten by plants, 114 Animals, life of, 3, 7 Anther, 80, 81 Assimilation (see Food building) Associations of plants, 152, 189 Axil of leaf, 75, 66 B Bacteria, 144 Bean seeds, 8, 3, 9, 4 Bean seedlings, 10, 6, 11, 7 Bean seedlings grown in dark, 38, 27 Bean seedlings, growth of, 41, 28 Beech leaf, 65 Bees and flowers, 119 Bidens, fruits of, 90, 87 Bilberry, 154 Bladderwort, 116, 113, 114 Bladderwrack, 144, 135, 173, Pl. VII. Bog-land, 156 Bracken fern, 133, Pl. I. Bramble, 63, 49 Bread, starch in, 11 Breathing of animals, 6, 2 Breathing of plants, 5, 1, 96 Breathing pores, 96, 96 Broom, 62 Broomrape, 113, 109 Buds, 72 Buds of fern, 134, 127 Buds of horse chestnut, 72, 62, 63 Buds, overlapping scales of, 73, 63, 64 Bud scales, 74, 65 Bud scars, 75, 66 Buds of sycamore, 75, 66 Buds, unfolding of, 72, 62 Bulbs, 77, 68 Bulrushes, 151, 138 Bulrushes, rhizome of, 161, 143 Bur, fruit of, 90, 86 Buttercup, flower of, 82, 76 Buttercup, water-, 159, 141 Butterwort, 115, 112 C Cactus, 2, 62, 48, 99 Calcium phosphate, 15 Calcium sulphate, 15 Calyx, 79, 70 Canadian water-plant, 21, 13 Capsule of moss, 139, 131 Capsule of poppy, 89, 85 Carbon, 19, 23 Carbonic acid gas, 6, 19, 24, 27 Carex, 166, 146 Carpel, 82, 76, 77, 78 Carrot, 55, 38 Caustic potash, 20, 12 Cells, 92, 91 Cherry flower, 82, 78 Cherry fruit, 88, 82 Cherry leaf, 64, 50 Cherry leaf arrangement, 69, 58 Cherry stipules, 64, 50 Chlorophyll, 17, 24, 27 Circulation of water, 28 Climbing plants, 104 Climbing assisted by roots, 106, 101 Climbing by tendrils, 107, 104, 108, 105 Climbing by twining stem, 106, 102, 107, 103 Clover attacked by dodder, 110, 106, 107 Club-moss, 137 Coal, 153, 178 Collecting, 194 Colour of petals, 80 Cones of pine, 127, 128, 123 β€œControl plant,” 16 Convolvulus, twining of, 106, 102 Cork, 95 Cornflower, 121, 122 Cotyledons of bean, 9, 4 Cotyledons of pine, 129, 130, 126 Cotyledons of rose, 66, 54 Cow-wheat, 113 D Dahlia, roots of, 56, 39 Daisy, flower of, 121, 121 Dandelion, fruit of, 88, 83 Darkness, effect on growth of, 38, 27 Dead nettle, 68, 56, 149, 137 Deserts, 100 Dicotyledons, 126 Distilled water, 15 Ditches, 150 Dodder, 110, 106, 107 Downs, 183 Duckweed, 151, 139, 161 Drowning, of trees, 185, 154, 155 E Elder tree, twig of, 96, 96 Elodea, 21, 13 Embryo, 9 Excursions, 194 Eyebright, 113 F Ferns, bud of, 134, 127 Ferns, family of, 133 Ferns, fossil, 179, 152, 181 Ferns, prothallium of, 135, 129 Ferns, spore-cases of, 135, 128 Ferns, β€œsporeling” of, 136 Flowers, 78 Flowers in relation to insects, 118 Flowering family, 125 Food-building in leaves, 23 Food materials, 14, 18 Food solutions, 15 Fossils, 179, 151 Fossils, tree, 180, 153 Foxglove flower, 119, 117 Foxglove in hedges, 146, Pl. IV. Fruits, 86 Fucus, (see also Bladderwrack), 173, Pl. VII. Fungi, 109 Fungi, spores of, 143 Fungi, structure of, 142, 133 G Goose-grass, leaves of, 69, 60 Goose-grass, fruit of, 90, 87 Gorse, 102, 99 Gorse, flowers of, 119, 119 Grass, leaves of 66 Grass, roots of, 54, 37 Gravitation, 44 Growth, 40 Growth, direction of, 41, 29, 43, 30 Growth, region of, 40, 28 H Hairs, 96 Harebell, 78, 69 Heather, 154 Hedges, 147, Pl. IV. Holly, 54, 36 Honeysuckle, leaves of, 68, 57 Hop, 106 Horse chestnut, buds of, 72, 62 Horsetail, leaves of, 69, 59 Horsetail, family of, 137 I 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,
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