sted,
requires confirmation.

* * * * *

_Conclusion and Summary of the Chapter._--The facts given in the latter
half of this chapter are well worthy of consideration, as they show us in
how many extraordinary modes one organic form may lead to the modification
of another, and often without the intervention of seminal reproduction.
There is ample evidence, as we have just seen, that the male element may
either directly affect the structure of the female, or in the case of
animals lead to the modification of her offspring. There is a considerable
but insufficient body of evidence showing that the tissues of two plants
may unite and form a bud having a blended character; or again, that buds
inserted into a stock may affect all the buds subsequently produced by this
stock. Two embryos, differing from each other and contained in the same
seed, may cohere and form a single plant. Offspring from a cross between
two species or varieties may in the first or in a succeeding generation
revert in various degrees by bud-variation to their parent-forms; and this
reversion or segregation of character may affect the whole flower, fruit,
or leaf-bud, or only the half or smaller segment, or a single organ. In
some cases this segregation of character apparently depends on some {406}
incapacity of union rather than on reversion, for the flowers or fruit
which are first produced display by segments the characters of both
parents. In the _Cytisus adami_ and the Bizzarria orange, whatever their
origin may have been, the two parent species occur blended together under
the form of a sterile hybrid, or reappear with their characters perfect and
their reproductive organs effective; and these trees, retaining the same
sportive character, can be propagated by buds. These various facts ought to
be well considered by any one who wishes to embrace under a single point of
view the various modes of reproduction by gemmation, division, and sexual
union, the reparation of lost parts, variation, inheritance, reversion, and
other such phenomena. In a chapter towards the close of the following
volume I shall attempt to connect these facts together by a provisional
hypothesis.

In the early half of this chapter I have given a long list of plants in
which through bud-variation, that is, independently of reproduction by
seed, the fruit has suddenly become modified in size, colour, flavour,
hairiness, shape, and time of maturity