The plants in Pots 3 and 5 were placed under a net in the greenhouse,
two of the crossed plants in the latter pot being pulled up on account
of the death of two of the self-fertilised; so that altogether six
crossed and six self-fertilised plants were left to fertilise themselves
spontaneously. The pots were rather small, and the plants did not
produce many capsules. The small size of the self-fertilised plants will
largely account for the fewness of the capsules which they produced. The
six crossed plants bore 105, and the six self-fertilised only 30
capsules; or as 100 to 29.
The self-fertilised seeds thus obtained from the crossed and
self-fertilised plants, after germinating on sand, were planted on the
opposite sides of four small pots, and treated as before. But many of
the plants were unhealthy, and their heights were so unequal--some on
both sides being five times as tall as the others--that the averages
deduced from the measurements in Table 5/73 are not in the least
trustworthy. Nevertheless I have felt bound to give them, as they are
opposed to my general conclusions.
The seven self-fertilised plants from the crossed plants here average
15.73, and the seven self-fertilised from the self-fertilised 21 inches
in height; or as 100 to 133. Strictly analogous experiments with Viola
tricolor and Lathyrus odoratus gave a very different result.
TABLE 5/73.
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