I must premise that, from not
foreseeing the result, I did not keep a memorandum whether the eight plants of
the first lot were the product of the mid-length or shortest stamens of the same
form; but I have good reason to believe that they were the product of the
latter. These eight plants were much more dwarfed, and much more sterile than
those in the other two lots. The latter were raised from a long-styled plant
growing quite isolated, and fertilised by the agency of bees with its own
pollen; and it is almost certain, from the relative position of the organs of
fructification, that the stigma under these circumstances would receive pollen
from the mid-length stamens.
All the fifty-six plants in these three lots proved long-styled; now, if the
parent-plants had been legitimately fertilised by pollen from the longest
stamens of the mid-styled and short-styled forms, only about one-third of the
seedlings would have been long-styled, the other two-thirds being mid-styled and
short-styled. In some other trimorphic and dimorphic genera we shall find the
same curious fact, namely, that the long-styled form, fertilised illegitimately
by its own-form pollen, produces almost exclusively long-styled seedlings. (5/1.
Hildebrand first called attention to this fact in the case of Primula Sinensis
('Botanische Zeitung' January 1, 1864 page 5); but his results were not nearly
so uniform as mine.
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