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Variation of Animals and Plants under Domestication, the — Volume 2 by Charles Darwin
page 92 of 776 (11%)

Analogous facts have been observed with plants: Major Trevor Clarke crossed
the little, glabrous-leaved, annual stock (Matthiola), with pollen of a large,
red-flowered, rough-leaved, biennial stock, called cocardeau by the French,
and the result was that half the seedlings had glabrous and the other half
rough leaves, but none had leaves in an intermediate state. That the glabrous
seedlings were the product of the rough-leaved variety, and not accidentally
of the mother-plant's own pollen, was shown by their tall and strong habit of
growth. (15/19. 'Internat. Hort. and Bot. Congress of London' 1866.) in the
succeeding generations raised from the rough-leaved crossed seedlings, some
glabrous plants appeared, showing that the glabrous character, though
incapable of blending with and modifying the rough leaves, was all the time
latent in this family of plants. The numerous plants formerly referred to,
which I raised from reciprocal crosses between the peloric and common
Antirrhinum, offer a nearly parallel case; for in the first generation all the
plants resembled the common form, and in the next generation, out of one
hundred and thirty-seven plants, two alone were in an intermediate condition,
the others perfectly resembling either the peloric or common form. Major
Trevor Clarke also fertilised the above-mentioned red-flowered stock with
pollen from the purple Queen stock, and about half the seedlings scarcely
differed in habit, and not at all in the red colour of the flower, from the
mother-plant, the other half bearing blossoms of a rich purple, closely like
those of the paternal plant. Gartner crossed many white and yellow-flowered
species and varieties of Verbascum; and these colours were never blended, but
the offspring bore either pure white or pure yellow blossoms; the former in
the larger proportion. (15/20. 'Bastarderzeugung' s. 307. Kolreuter 'Dritte
Fortsetszung' s. 34, 39 however, obtained intermediate tints from similar
crosses in the genus Verbascum. With respect to the turnips see Herbert
'Amaryllidaceae' 1837 page 370.) Dr. Herbert raised many seedlings, as he
informed me, from Swedish turnips crossed by two other varieties, and these
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