But this great inequality is in part
accidental, owing to some of the self-fertilised plants being very
short, and to one of the crossed being very tall.
Twelve flowers on these crossed plants were again crossed, and eleven
capsules were produced; of these, five were poor and six good; the
latter contained by weight 3.75 grains of seeds. Twelve flowers on the
self-fertilised plants were again fertilised with their own pollen and
produced no less than twelve capsules, and the six finest of these
contained by weight 2.57 grains of seeds. It should however be observed
that these latter capsules were produced by the plants in Pot 3, which
were not exposed to any competition. The seeds in the six fine crossed
capsules to those in the six finest self-fertilised capsules were in
weight as 100 to 68. From these seeds the plants of the next generation
were raised.
CROSSED AND SELF-FERTILISED PLANTS OF THE THIRD GENERATION.
TABLE 6/78. Petunia violacea (third generation; plants very young).
Heights of plants measured in inches.
Column 1: Number (Name) of Pot.
Column 2: Crossed Plants.
Column 3: Self-fertilised Plants.
Pot 1 : 1 4/8 : 5 6/8.
Pot 1 : 1 : 4 4/8.
Pot 2 : 5 7/8 : 8 3/8.
Pot 2 : 5 6/8 : 6 7/8.
Pot 3 : 4 : 5 5/8.
Pot 4 : 1 4/8 : 5 3/8.
Total : 19.63 : 36.50.
The above seeds were placed on sand, and after germinating were planted
in pairs on the opposite sides of four pots; and all the remaining seeds
were thickly sown on the two sides of a fifth large pot.
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