But this plant must have been
exposed during at least four generations to very different conditions
from those to which my plants had been subjected, as these had been
grown in pots in the greenhouse. Eight flowers on the self-fertilised
plants in Table 6/81, of the last or fourth self-fertilised generation,
were fertilised with pollen from this fresh stock; all eight produced
capsules containing together by weight 5.01 grains of seeds. The plants
raised from these seeds may be called the Westerham-crossed.
Eight flowers on the crossed plants of the last or fourth generation in
Table 6/81 were again crossed with pollen from one of the other crossed
plants, and produced five capsules, containing by weight 2.07 grains of
seeds. The plants raised from these seeds may be called the
INTERCROSSED; and these form the fifth intercrossed generation.
Eight flowers on the self-fertilised plants of the same generation in
Table 6/81 were again self-fertilised, and produced seven capsules,
containing by weight 2.1 grains of seeds. The SELF-FERTILISED plants
raised from these seeds form the fifth self-fertilised generation. These
latter plants and the intercrossed are comparable in all respects with
the crossed and self-fertilised plants of the four previous generations.
From the foregoing data it is easy to calculate that:
Ten Westerham-crossed capsules would have contained 6.
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