mble. From the various facts now
given there can be no doubt that the same individual plant, whether a
hybrid or a mongrel, sometimes returns in its leaves, flowers, and fruit,
either wholly or by segments, to both parent-forms, in the same manner as
the _Cytisus adami_, and the _Bizzarria Orange_.

* * * * *

We will now consider the few facts which have been recorded in support of
the belief that a variety when grafted or budded on another variety
sometimes affects the whole stock, or at the point of junction gives rise
to a bud, or graft-hybrid, which partakes of the characters of both stock
and scion.

It is notorious that when the variegated Jessamine is budded on the
common kind, the stock sometimes produces buds bearing variegated
leaves: Mr. Rivers, as he informs me, has seen instances of this. The
same thing occurs with the Oleander.[922] Mr. Rivers, on the authority
of a trustworthy friend, states that some buds of a golden-variegated
ash, which were inserted into common ashes, all died except one; but
the ash-stocks were affected,[923] and produced, both above and below
the points of insertion of the plates of bark bearing the dead buds,
shoots which bore variegated leaves. Mr. J. Anderson Henry has
communicated to me a nearly similar case: Mr. Brown, of Perth, observed
many years ago, in a Highland glen, an ash-tree with yellow leaves; and
buds taken from this tree were inserted into common ashes, which in
consequence were affected, and produced the _Blotched Breadalbane Ash_.
This variety has been propagated, and has preserved its character
during the last fifty years. Weeping ashes, also, were budded on the
affected stocks, and became similarly variegated. Many authors consider
variegation as the result of disease; and on this view, which however
is doubtful, for some variegated plants are perfectly healthy and
vigorous, the foregoing cases may be looked at as the direct result of
the inoculation of a disease. Variegation is much influenced, as we
shall hereafter see, by the nature of the soil in which the {395}
plants are grown; and it does not seem improbable that whatever change
in the sap or tissues certain soils induce, whether or not called a
disease, might spread from the inserted piece of bark to the stock. But
a change of this kind cannot be considered to be of the na