I suppose even that apocryphal7 person, the general reader, would be insulted at being told at this hour of the day that all bright-coloured flowers are fertilised by the visits of insects, whose attentions they are specially8 designed to solicit9. Everybody has heard over and over again that roses, orchids10, and columbines have acquired their honey to allure11 the friendly bee, their gaudy12 petals13 to advertise the honey, and their divers14 shapes to ensure the proper fertilisation by the correct type of insect. But everybody does not know how specifically certain blossoms have laid themselves out for a particular species of fly, beetle, or tiny moth3. Here on the higher downs, for instance, most flowers are exceptionally large and brilliant; while all Alpine15 climbers must have noticed that the most gorgeous masses of bloom in Switzerland occur just below the snow-line. The reason is, that such blossoms must be fertilised by butterflies alone. Bees, their great rivals in honey-sucking, frequent only the lower meadows and slopes, where flowers are many and small: they seldom venture far from the hive or the nest among the high peaks and chilly16 nooks where we find those great patches of blue gentian or purple anemone17, which hang like monstrous18 breadths of tapestry19 upon the mountain sides. This heather here, now fully20 opening in the warmer sun of the southern counties—it is still but in the bud among the Scotch21 hills, I doubt not—specially lays itself out for the bumblebee, and its masses form about his highest pasture-grounds; but the butterflies—insect vagrants22 that they are—have no fixed23 home, and they therefore stray far above the level at which bee-blossoms altogether cease to grow. Now, the butterfly differs greatly from the bee in his mode of honey-hunting; he does not bustle24 about in a business-like manner from one buttercup or dead-nettle to its nearest fellow; but he flits joyously25, like a sauntering straggler that he is, from a great patch of colour here to another great patch at a distance, whose gleam happens to strike his roving eye by its size and brilliancy. Hence, as that indefatigable26 observer, Dr. Hermann Müller, has noticed, all Alpine or hill-top flowers have very large and conspicuous27 blossoms, generally grouped together in big clusters so as to catch a passing glance of the butterfly's eye. As soon as the insect spies such a cluster, the colour seems to act as a stimulant28 to his broad wings, just as the candle-light does to those of his cousin the moth. Off he sails at once, as if by automatic action, towards the distant patch, and there both robs the plant of its honey and at the same time carries to it on his legs and head fertilising pollen29 from the last of its congeners which he favoured with a call. For of course both bees and butterflies stick on the whole to a single species at a time; or else the flowers would only get uselessly hybridised instead of being impregnated with pollen from other plants of their own kind. For this purpose it is that most plants lay themselves out to secure the attention of only two or three varieties among their insect allies, while they make their nectaries either too deep or too shallow for the convenience of all other kinds. Nature, though eager for cross-fertilisation, abhors30 'miscegenation31' with all the bitterness of an American politician.
Insects, however, differ much from one another in their ?sthetic tastes, and flowers are adapted accordingly to the varying fancies of the different kinds. Here, for example, is a spray of common white galium, which attracts and is fertilised by small flies, who generally frequent white blossoms. But here, again, not far off, I find a luxuriant mass of the yellow species, known by the quaint32 name of 'lady's bedstraw'—a legacy33 from the old legend which represents it as having formed Our Lady's bed in the manger at Bethlehem. Now why has this kind of galium yellow flowers, while its near kinsman34 yonder has them snowy white? The reason is that lady's bedstraw is fertilised by small beetles35; and beetles are known to be one among the most colour-loving races of insects. You may often find one of their number, the lovely bronze and golden-mailed rose-chafer, buried deeply in the very centre of a red garden rose, and reeling about when touched as if drunk with pollen and honey. Almost all the flowers which beetles frequent are consequently brightly decked in scarlet36 or yellow. On the other hand, the whole family of the umbellates, those tall plants with level bunches of tiny blossoms, like the fool's parsley, have all but universally white petals; and Müller, the most statistical37 of naturalists38, took the trouble to count the number of insects which paid them a visit. He found that only 14 per cent. were bees, while the remainder consisted mainly of miscellaneous small flies and other arthropodous riff-raff; whereas in the brilliant class of composites, including the asters, sunflowers, daisies, dandelions, and thistles, nearly 75 per cent. of the visitors were steady, industrious39 bees. Certain dingy40 blossoms which lay themselves out to attract wasps41 are obviously adapted, as Müller quaintly42 remarks, 'to a less ?sthetically cultivated circle of visitors.' But the most brilliant among all insect-fertilised flowers are those which specially affect the society of butterflies; and they are only surpassed in this respect throughout all nature by the still larger and more magnificent tropical species which owe their fertilisation to humming-birds and brush-tongued lories.
Is it not a curious, yet a comprehensible circumstance, that the tastes which thus show themselves in the development, by natural selection, of lovely flowers, should also show themselves in the marked preference for beautiful mates? Poised43 on yonder sprig of harebell stands a little purple-winged butterfly, one of the most exquisite44 among our British kinds. That little butterfly owes its own rich and delicately shaded tints45 to the long selective action of a million generations among its ancestors. So we find throughout that the most beautifully coloured birds and insects are always those which have had most to do with the production of bright-coloured fruits and flowers. The butterflies and rose-beetles are the most gorgeous among insects: the humming-birds and parrots are the most gorgeous among birds. Nay46 more, exactly like effects have been produced in two hemispheres on different tribes by the same causes. The plain brown swifts of the North have developed among tropical West Indian and South American orchids the metallic47 gorgets and crimson48 crests49 of the humming-bird: while a totally unlike group of Asiatic birds have developed among the rich flora50 of India and the Malay Archipelago the exactly similar plumage of the exquisite sun-birds. Just as bees depend upon flowers, and flowers upon bees, so the colour-sense of animals has created the bright petals of blossoms; and the bright petals have reacted upon the tastes of the animals themselves, and through their tastes upon their own appearance.
点击收听单词发音
1 avocation | |
n.副业,业余爱好 | |
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2 beetle | |
n.甲虫,近视眼的人 | |
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3 moth | |
n.蛾,蛀虫 | |
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4 stifle | |
vt.使窒息;闷死;扼杀;抑止,阻止 | |
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5 reeking | |
v.发出浓烈的臭气( reek的现在分词 );散发臭气;发出难闻的气味 (of sth);明显带有(令人不快或生疑的跡象) | |
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6 inspection | |
n.检查,审查,检阅 | |
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7 apocryphal | |
adj.假冒的,虚假的 | |
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8 specially | |
adv.特定地;特殊地;明确地 | |
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9 solicit | |
vi.勾引;乞求;vt.请求,乞求;招揽(生意) | |
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10 orchids | |
n.兰花( orchid的名词复数 ) | |
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11 allure | |
n.诱惑力,魅力;vt.诱惑,引诱,吸引 | |
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12 gaudy | |
adj.华而不实的;俗丽的 | |
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13 petals | |
n.花瓣( petal的名词复数 ) | |
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14 divers | |
adj.不同的;种种的 | |
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15 alpine | |
adj.高山的;n.高山植物 | |
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16 chilly | |
adj.凉快的,寒冷的 | |
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17 anemone | |
n.海葵 | |
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18 monstrous | |
adj.巨大的;恐怖的;可耻的,丢脸的 | |
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19 tapestry | |
n.挂毯,丰富多采的画面 | |
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20 fully | |
adv.完全地,全部地,彻底地;充分地 | |
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21 scotch | |
n.伤口,刻痕;苏格兰威士忌酒;v.粉碎,消灭,阻止;adj.苏格兰(人)的 | |
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22 vagrants | |
流浪者( vagrant的名词复数 ); 无业游民; 乞丐; 无赖 | |
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23 fixed | |
adj.固定的,不变的,准备好的;(计算机)固定的 | |
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24 bustle | |
v.喧扰地忙乱,匆忙,奔忙;n.忙碌;喧闹 | |
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25 joyously | |
ad.快乐地, 高兴地 | |
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26 indefatigable | |
adj.不知疲倦的,不屈不挠的 | |
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27 conspicuous | |
adj.明眼的,惹人注目的;炫耀的,摆阔气的 | |
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28 stimulant | |
n.刺激物,兴奋剂 | |
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29 pollen | |
n.[植]花粉 | |
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30 abhors | |
v.憎恶( abhor的第三人称单数 );(厌恶地)回避;拒绝;淘汰 | |
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31 miscegenation | |
n.人种混杂;混血 | |
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32 quaint | |
adj.古雅的,离奇有趣的,奇怪的 | |
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33 legacy | |
n.遗产,遗赠;先人(或过去)留下的东西 | |
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34 kinsman | |
n.男亲属 | |
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35 beetles | |
n.甲虫( beetle的名词复数 ) | |
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36 scarlet | |
n.深红色,绯红色,红衣;adj.绯红色的 | |
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37 statistical | |
adj.统计的,统计学的 | |
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38 naturalists | |
n.博物学家( naturalist的名词复数 );(文学艺术的)自然主义者 | |
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39 industrious | |
adj.勤劳的,刻苦的,奋发的 | |
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40 dingy | |
adj.昏暗的,肮脏的 | |
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41 wasps | |
黄蜂( wasp的名词复数 ); 胡蜂; 易动怒的人; 刻毒的人 | |
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42 quaintly | |
adv.古怪离奇地 | |
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43 poised | |
a.摆好姿势不动的 | |
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44 exquisite | |
adj.精美的;敏锐的;剧烈的,感觉强烈的 | |
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45 tints | |
色彩( tint的名词复数 ); 带白的颜色; (淡色)染发剂; 痕迹 | |
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46 nay | |
adv.不;n.反对票,投反对票者 | |
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47 metallic | |
adj.金属的;金属制的;含金属的;产金属的;像金属的 | |
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48 crimson | |
n./adj.深(绯)红色(的);vi.脸变绯红色 | |
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49 crests | |
v.到达山顶(或浪峰)( crest的第三人称单数 );到达洪峰,达到顶点 | |
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50 flora | |
n.(某一地区的)植物群 | |
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