3. Mimulus luteus.
Twenty-two plants raised by crossing flowers on the same plant were
grown in competition with the same number of self-fertilised plants; and
the former were to the latter in height as 100 to 105, and in weight as
100 to 103. Moreover, in seven out of the eight pots a self-fertilised
plant flowered before any of the intercrossed plants. So that here again
the self-fertilised exhibit a slight superiority over the intercrossed
plants. For the sake of comparison, I may add that seedlings raised
during three generations from a cross between distinct plants were to
the self-fertilised plants in height as 100 to 65.
4. Pelargonium zonale.
Two plants growing in separate pots, which had been propagated by
cuttings from the same plant, and therefore formed in fact parts of the
same individual, were intercrossed, and other flowers on one of these
plants were self-fertilised; but the seedlings obtained by the two
processes did not differ in height. When, on the other hand, flowers on
one of the above plants were crossed with pollen taken from a distinct
seedling, and other flowers were self-fertilised, the crossed offspring
thus obtained were to the self-fertilised in height as 100 to 74.
5. Origanum vulgare.
A plant which had been long cultivated in my kitchen garden, had spread
by stolons so as to form a large bed or clump. Seedlings raised by
intercrossing flowers on these plants, which strictly consisted of the
same plant, and other seedlings raised from self-fertilised flowers,
were carefully compared from their earliest youth to maturity; and they
did not differ at all in height or in constitutional vigour.
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