e., grandchildren of the plants which
grew in Brazil) were again fertilised with pollen from the same plant,
and produced five capsules, containing on an average 27.4 seeds, with a
maximum in one of forty-two seeds. The seedlings raised from these seeds
formed the second SELF-FERTILISED generation of the Brazilian stock.
Eight flowers on one of the crossed plants of the last experiment were
crossed with pollen from another grandchild, and produced five capsules.
These contained on an average 31.6 seeds, with a maximum in one of
forty-nine seeds. The seedlings raised from these seeds may be called
the INTERCROSSED.
Lastly, eight other flowers on the crossed plants of the last experiment
were fertilised with pollen from a plant of the English stock, growing
in my garden, and which must have been exposed during many previous
generations to very different conditions from those to which the
Brazilian progenitors of the mother-plant had been subjected. These
eight flowers produced only four capsules, containing on an average 63.2
seeds, with a maximum in one of ninety. The plants raised from these
seeds may be called the ENGLISH-CROSSED. As far as the above averages
can be trusted from so few capsules, the English-crossed capsules
contained twice as many seeds as the intercrossed, and rather more than
twice as many as the self-fertilised capsules. The plants which yielded
these capsules were grown in pots in the greenhouse, so that their
absolute productiveness must not be compared with that of plants growing
out of doors.
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