e position. The _Cruciferae_, of
which family the last-named plant is a member, are particularly liable
to this malformation, as also are the _Rosaceae_, as will be seen from
the following illustrations. Roses indeed often exhibit alterations of
this kind as the commencement of prolification. There is also in
cultivation a rose[282] called the green rose, "Rose bengale a fleurs
vertes," in which all the parts of the flower are represented by leaves.
One of the most remarkable features in this plant is, that the carpels
have often two ovules on their margins. Now, Payer, in his
"Organogenie," has shown that at a certain period of the development of
the ordinary rose flower the ovary contains two collateral ovules, of
which one becomes in process of time suppressed.[283] _Geum coccineum_
has been found by Wigand with its flowers in this condition.[284]

Lindley[285] figures a very interesting illustration in _Potentilla
nepalensis_, in which some of the flowers have their component parts
leafy, in others the receptacle lengthens, till in extreme cases the
whole of the floral apparatus is represented by a branch bearing a
rosette of leaves.

A particular variety of the Alpine strawberry is also described as
occasionally subject to this transformation. In these flowers the calyx
remains normal, while all the other parts of the flower, even to the
coating of the ovule, assume a leaf-like condition.[286]

Among _Leguminosae_ a partial leafy condition (frondescence), or a more
complete degree of the same change, (chloranthy) is not infrequent,
particularly in _Trifolium repens_. In this species the changes are so
common, so various and important, that they may be alluded to in some
little detail. M. Germain de Saint Pierre,[287] in commenting on the
frequency with which the flowers of this plant are more or less
frondescent, remarks that although all the flowers on one plant may be
affected, they are all changed in the same manner, but on different
specimens different degrees of transformation are found. In all the
corolla and stamens are comparatively little removed from the ordinary
form, the calyx and pistil, however, have a particular tendency to
assume a foliar condition. The author just cited arranges the
malformations of this plant under three heads, as follows:

1. Calyx-teeth larger than usual, sometimes dentate at the
margin; petals more or less regular and disposed to run away
from the papilionace