The earlier flowers produced by these
self-fertilised plants did not set any capsules, and their anthers
contained only a small amount of pollen; but to this subject I shall
return. Nevertheless capsules produced by two other self-fertilised
plants of the same lot, not included in Table 2/9, which had been highly
favoured by being grown in separate pots, contained the large average
number of 5.1 seeds per capsule.
TABLE 2/9. Ipomoea purpurea (Eighth Generation).
Heights of Plants in inches:
Column 1: Number (Name) of Pot.
Column 2: Crossed Plants.
Column 3: Self-fertilised Plants.
Pot 1 : 111 6/8 : 96.
Pot 1 : 127 : 54.
Pot 1 : 130 6/8 : 93 4/8.
Pot 2 : 97 2/8 : 94.
Pot 2 : 89 4/8 : 125 6/8.
Pot 3 : 103 6/8 : 115 4/8.
Pot 3 : 100 6/8 : 84 6/8.
Pot 3 : 147 4/8 : 109 6/8.
Total : 908.25 : 773.25.
CROSSED AND SELF-FERTILISED PLANTS OF THE NINTH GENERATION.
The plants of this generation were raised in the same manner as before,
with the result shown in Table 2/10.
The fourteen crossed plants average in height 81.39 inches and the
fourteen self-fertilised plants 64.07, or as 100 to 79. One
self-fertilised plant in Pot 3 exceeded, and one in Pot 4 equalled in
height, its opponent. The self-fertilised plants showed no sign of
inheriting the precocious growth of their parents; this having been due,
as it would appear, to the abnormal state of the seeds from the
unhealthiness of their parents.
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