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Updated: June 27, 2025
Hybrids are seldom raised by experimentalists in great numbers; and as the parent-species, or other allied hybrids, generally grow in the same garden, the visits of insects must be carefully prevented during the flowering season: hence hybrids will generally be fertilised during each generation by their own individual pollen; and I am convinced that this would be injurious to their fertility, already lessened by their hybrid origin.
And thus, the strange fact of an increase of fertility in the successive generations of ARTIFICIALLY FERTILISED hybrids, in contrast with those spontaneously self-fertilised, may, as I believe, be accounted for by too close interbreeding having been avoided. Now let us turn to the results arrived at by a third most experienced hybridiser, namely, the Hon. and Rev. W. Herbert.
For these plants have been found to yield seed to the pollen of a distinct species, though quite sterile with their own pollen, notwithstanding that their own pollen was found to be perfectly good, for it fertilised distinct species. So that certain individual plants and all the individuals of certain species can actually be hybridised much more readily than they can be self-fertilised!
The following case is far more remarkable, and seems at first quite incredible; but it is the result of an astonishing number of experiments made during many years on nine species of Verbascum, by so good an observer and so hostile a witness, as Gartner: namely, that yellow and white varieties of the same species of Verbascum when intercrossed produce less seed, than do either coloured varieties when fertilised with pollen from their own coloured flowers.
I had seen in other lands much to admire, and much to imitate; but it must not be forgotten that England is the source from which those streams of liberty and enlightenment have flowed which have fertilised the Western Continent.
A dominant is something present which is absent in the recessive: the rose comb is due to a factor which is absent from the single. The two segregate in the gametes of the hybrid or heterozygote, and if a recessive gamete is fertilised by another recessive gamete the single comb reappears.
Herbert, a most trustworthy authority, not only asserts as the result of his own observations and experiments that many hybrids are quite as fertile as the parent species, but he goes so far as to assert that the particular plant 'Crinum capense' is much more fertile when crossed by a distinct species than when fertilised by its proper pollen!
By means of drains and sluices, which had not been brought into use without the expenditure of much capital, he had thoroughly fertilised some eighty acres, where he grew large crops of hay, which he sent across the lake to Galway, and fed his sheep on the after-grass with great profit. But the care of the sluices had been a great labour, and, latterly, a great trouble to Mr. Jones.
The edge of the crest also is then tipped with bright red or violet. The female is usually of a yellowish-brown colour with scattered brown dots, and the lower surface is often quite plain. The ova are fertilised during the act of deposition, and are not subsequently tended by either parent.
On the other hand, in Lechrain people say that if a young man and woman, leaping over the midsummer fire together, escape unsmirched, the young woman will not become a mother within twelve months; the flames have not touched and fertilised her.
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