They were also, when fully grown, much more
branched with larger leaves and somewhat larger flowers than the plants
of the other two lots, so that if they had been weighed, the ratio would
certainly have been much higher than that of 100 to 56 and 52.
The intercrossed plants are here to the self-fertilised in height as 100
to 92; whereas in the analogous experiment given in Table 3/19 the
intercrossed plants from the self-fertilised plants of the sixth
generation were inferior in height to the self-fertilised plants in the
ratio of 100 to 110. I doubt whether this discordance in the results of
the two experiments can be explained by the self-fertilised plants in
the present case having been raised from spontaneously self-fertilised
seeds, whereas in the former case they were raised from artificially
self-fertilised seeds; nor by the present plants having been
self-fertilised during two additional generations, though this is a more
probable explanation.
With respect to fertility, the twenty-eight Chelsea-crossed plants
produced 272 capsules; the twenty-seven intercrossed plants produced 24;
and the seventeen self-fertilised plants 17 capsules. All the plants
were left uncovered so as to be naturally fertilised, and empty capsules
were rejected.
Therefore 20 Chelsea-crossed plants would have produced 194.29 capsules.
Therefore 20 Intercrossed plants would have produced 17.
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