The flowers on the self-fertilised plants of the last or second
generation (Table 4/29) were allowed to fertilise themselves
spontaneously under a net, and yielded plenty of seeds. These latter and
the crossed seeds, after germinating on sand, were planted in pairs on
the opposite sides of six large pots, which were kept at first in a cool
greenhouse. Early in January their heights were measured to the tips of
their leaves. The thirteen crossed plants averaged 13.16 inches in
height, and the twelve (for one had died) self-fertilised plants
averaged 13.7 inches, or as 100 to 104; so that the self-fertilised
plants exceeded by a little the crossed plants.
TABLE 3/30. Brassica oleracea.
Weights in ounces of plants after they had formed heads.
Column 1: Number (Name) of Pot.
Column 2: Crossed Plants from Pollen of fresh Stock.
Column 3: Self-fertilised Plants of the Third Generation.
Pot 1 : 130 : 18 2/4.
Pot 2 : 74 : 34 3/4.
Pot 3 : 121 : 17 2/4.
Pot 4 : 127 2/4 : 14.
Pot 5 : 90 : 11 2/4.
Pot 6 : 106 2/4 : 46.
Total : 649.00 : 142.25.
Early in the spring the plants were gradually hardened, and turned out
of their pots into the open ground without being disturbed. By the end
of August the greater number had formed fine heads, but several grew
extremely crooked, from having been drawn up to the light whilst in the
greenhouse.
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