Seeds in an equal state of germination were planted on the opposite
sides of four pots, but only the two tallest plants on each side of each
pot were measured to the tops of their stems. The pots were placed in
the greenhouse, and the plants trained up sticks, so that they ascended
to an unusual height. In three of the pots the crossed plants flowered
first, but in the fourth at the same time with the self-fertilised. When
the seedlings were between 6 and 7 inches in height, the crossed began
to show a slight advantage over their opponents. When grown to a
considerable height the eight tallest crossed plants averaged 44.43, and
the eight tallest self-fertilised plants 37.34 inches, or as 100 to 84.
When their growth was completed they were again measured, as shown in
Table 5/50.
TABLE 5/50. Tropaeolum minus.
Heights of plants measured in inches.
Column 1: Number (Name) of Pot.
Column 2: Crossed Plants.
Column 3: Self-fertilised Plants.
Pot 1 : 65 : 31.
Pot 1 : 50 : 45.
Pot 2 : 69 : 42.
Pot 2 : 35 : 45.
Pot 3 : 70 : 50 4/8.
Pot 3 : 59 4/8 : 55 4/8.
Pot 4 : 61 4/8 : 37 4/8.
Pot 4 : 57 4/8 : 61 4/8.
Total : 467.5 : 368.0.
The eight tallest crossed plants now averaged 58.43, and the eight
tallest self-fertilised plants 46 inches in height, or as 100 to 79.
There was also a great difference in the fertility of the two lots which
were left uncovered in the greenhouse.
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