By the English-crossed and intercrossed plants, as 100 to 81.
By the intercrossed and self-fertilised plants, as 100 to 78.
But to have ascertained the productiveness of the three lots of plants,
it would have been necessary to know how many capsules were produced by
the same number of plants. The three long rows, however, were not of
quite equal lengths, and the plants were much crowded, so that it would
have been extremely difficult to have ascertained how many capsules were
produced by them, even if I had been willing to undertake so laborious a
task as to collect and count all the capsules. But this was feasible
with the plants grown in pots in the greenhouse; and although these were
much less fertile than those growing out of doors, their relative
fertility appeared, after carefully observing them, to be the same. The
nineteen plants of the English-crossed stock in the pots produced
altogether 240 capsules; the intercrossed plants (calculated as
nineteen) produced 137.22 capsules; and the nineteen self-fertilised
plants, 152 capsules. Now, knowing the number of seeds contained in
forty-five capsules of each lot, it is easy to calculate the relative
numbers of seeds produced by an equal number of the plants of the three
lots.
Number of seeds produced by an equal number of naturally-fertilised
plants:--
Plants of English-crossed and self-fertilised parentage, as 100 to 40
seeds.
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