394 SUPPRESSION. 
evidence furnished by teratology is conflicting, but 
there seems httle or nothing to invalidate the notion 
that the end of the flower-stalk and the base of the 
calyx may, to a varying extent, in different cases, 
jointly be concerned in the formation of the so-called 
calyx-tube and of the inferior ovary. Obviously it 1s 
not proper to apply to all cases where there is an 
inferior ovary the same explanation as to how it is 
brought about. 
As these pages are passing through the press, 
M. Casimir de Candolle has published a different 
explanation as to the nature of the hip of the rose, 
having been led to his opinion by the conclusion that 
he has arrived at, that the leaf is to be considered in 
the light of a flattened branch, whose upper or posterior 
surface 1s more or less completely atrophied. 
According to M. de Candolle, the calyx-tube, in the 
case of the rose, is neither a whorl of leaves, nor a 
concave axis in the ordinary sense in which those terms 
are used, but is rather to be considered as a ring-hke 
projection from an axis arrested in its ulterior develop- 
ment. ‘The secondary projections from the original one 
correspond to an equat number of vascular bundles, 
and develope into the sepals, petals, stamens, and 
ovaries. If these organs remained in a rudimentary 
condition, the tube of the calyx would be reduced to 
the condition of a sheathing leaf. The rose flower, 
then, according to M. de Candolle, may be considered 
as a Sheathing leaf, whose fibro-vascular system 1s 
complete, and from which all possible primary projec- 
tions are developed.’ 
If, as M. de Candolle considers, the leaf and the 
branch differ merely in the fact that the vascular system 
is complete in the latter, and partly atrophied in the 
former, it would surely be better to consider the ‘‘ calyx- 
tube”’ of the rose as a concave axis rather than as a 
leaf, seeing that he admits the fibro-vascular system to 
be complete in the case of the rose. 
1 «Théorie de la feuille,’ p, 24. 
a 
