Let us recall the cases of bud-atavism given by the whitish variety of
the scarlet _Ribes_, by peaches and nectarines, and by conifers,
including _Cephalotaxus_ and _Cryptomeria_. These and many other
analogous facts go to prove the relation of the variety to the species.
Two assumptions are allowable. In one the variety differs from the
species by the total loss of the [227] distinctive character. In the
other this character is simply reduced to an inactive or dormant state.
The fact of its recurrence from time to time, accompanied by secondary
characters previously exhibited, is a manifest proof of the existence of
some relation between the lost and the resumed peculiarity. Evidently
this relation cannot be accounted for on the assumption of an absolute
disappearance; something must remain from which the old features may be
restored.
This lengthy discussion may be closed by the citation of the cases, in
which plants not only show developmental features of a former state, but
also reproduce the special features they formerly had, but seemingly
have lost. Two good illustrative examples may be given. One is afforded
by the wheat-ear carnation, the other by the green dahlias, and both
have occurred of late in my own cultures.
A very curious anomaly may from time to time be observed in large beds
of carnations. It bears no flowers, but instead of them small green
ears, which recall the ears of wheat. Thence the name of "Wheat-ear"
carnation. On closer inspection it is easily seen how they originate.
The normal flowers of the carnations are preceded by a small group of
bracts, [228] which are arranged in opposite pairs and therefore
constitute four rows.
In this variety the flower is suppressed and this loss is attended by a
corresponding increase of the number of the pairs of bracts. This
malformation results in square spikes or somewhat elongated heads
consisting only of the greenish bracts. As there are no flowers, the
variety is quite sterile, and as it is not regarded by horticulturists
as an improvement on the ordinary bright carnations, it is seldom
multiplied by layering. Notwithstanding this, it appears from time to
time and has been seen in different countries and at different periods,
and, what is of great importance for us, in different strains of
carnations. Though sterile, and obviously dying out as often as it
springs into existence, it is nearly two centuries old. It was described
in the beginning of the 18th century by Volckamer, and afterwards by
Jaeger, De Candolle, Weber, Masters, Magnus and many other botanists. I
have had it twice, at different times and from different growers.
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