(1/12. 'Journal of the Linnean Society Botany' volume 8 1864 page 86.)
Three short-styled plants were protected by me from the access of insects, and
they did not produce a single seed. Mr. Scott protected six plants of both
forms, and found them excessively sterile. The pistil of the long-styled form
stands so high above the anthers, that it is scarcely possible that pollen
should reach the stigma without some aid; and one of Mr. Scott's long-styled
plants which yielded a few seeds (only 18 in number) was infested by aphides,
and he does not doubt that these had imperfectly fertilised it.
I tried a few experiments by reciprocally fertilising the two forms in the same
manner as before, but my plants were unhealthy, so I will give, in a condensed
form, the results of Mr. Scott's experiments. For fuller particulars with
respect to this and the five following species, the paper lately referred to may
be consulted. In each case the fertility of the two legitimate unions, taken
together, is compared with that of the two illegitimate unions together, by the
same two standards as before, namely, by the proportional number of flowers
which produced good capsules, and by the average number of seeds per capsule.
The fertility of the legitimate unions is always taken at 100.
By the first standard, the fertility of the two legitimate unions of the
auricula is to that of the two illegitimate unions as 100 to 80; and by the
second standard as 100 to 15.
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