→ to be excreted by the inner bases 1859 1860 1861 1866 |
was excreted from the inside 1869 1872 |
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→ flower. 1859 1860 1861 1866 |
certain number of plants of any species. 1869 1872 |
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→ In this case 1859 1860 1861 1866 |
OMIT 1869 1872 |
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→ the stigma of another flower. 1859 1860 1861 1866 |
another. 1869 1872 |
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→ we have good reason to believe (as will hereafter be more fully alluded to), would produce very 1859 1860 1861 1866 |
as we have good rea- son to believe, would produce 1869 |
as can be fully proved, gives rise to 1872 |
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↑ 1 blocks not present in 1859 1860 1861 1866; present in 1869 1872 |
The plants which produced flowers with the largest glands or nectaries, excreting most nectar, would oftenest be visited by insects, and would oftenest be crossed; and so in the long-run would gain the upper hand and form a local variety.
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→ from flower to flower, 1859 1860 1861 1866 |
OMIT 1869 1872 |
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→ a 1859 1860 1861 1866 |
to be a 1869 1872 |
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→ and those 1859 1860 1861 1866 |
and the 1869 |
to be thus robbed; and the 1872 |
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→ this process of the continued preservation or natural selection of more and more attractive flowers, 1859 1860 1861 1866 |
the above process long continued, 1869 1872 |
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juice or nectar
→to be excreted by the inner bases
of the
of a
→flower.
→In this case
in seeking the nectar would get dusted with pollen, and would
often transport
from one flower to
→the stigma of another flower. The flowers of two distinct individuals of the same species would thus get crossed; and the act of crossing,
→we have good reason to believe (as will hereafter be more fully alluded to), would produce very
vigorous seedlings, which consequently would have the best chance of flourishing and surviving. ↑
Some of these seedlings would
inherit the nectar-excreting power. Those individual flowers which had the largest glands or nectaries, and which excreted most nectar, would be oftenest visited by insects, and would be oftenest crossed; and so in the long-run would gain the upper hand.
flowers, also, which had their stamens and pistils placed, in relation to the size and habits of the particular
which visited them, so as to favour in any degree the transportal of
→from flower to flower,
would likewise be
We might have taken the case of insects visiting flowers for the sake of collecting pollen instead of nectar; and as pollen is formed for the sole
of fertilisation, its destruction appears
→a
simple loss to the plant; yet if a little pollen were carried, at first occasionally and then habitually, by the pollen-devouring insects from flower to flower, and a cross thus effected, although nine-tenths of the pollen were destroyed, it might still be a great gain to the
→and those
individuals which produced more and more pollen, and had larger
anthers, would be selected. |
|
When our plant, by
→this process of the continued preservation or natural selection of more and more attractive flowers,
had been rendered highly attractive to insects, they would, unintentionally on their part,
|