206 ALTERATION OF POSITION. 
direction of the leaves is that presented by a turnip (fig. 
107) presented to the Museum of King’s College, London, 
by the late Professor Edward Forbes. The turnip is 
hollow in the interior and the majority of the leaves 
springing from its apex instead of ascending into the 
hight and air become bent downwards so as to occupy 
the cavity, and in such a manner as to bring to mind 
the position of an inverted embryo in a seed. 
Altered direction of the flower and its parts—The changes 
which take place in the relative position either of 
the flower as a whole or of its several parts during 
growth are well known, as also are the relations which 
\ 
YY \ 
4 
4 
\ 
A WN 
\\ 

Fia. 107.—Hollow turnip, showing some of the leaves inverted and 
occupying the cavity. 
some of these movements bear to the process of ferti- 
lisation, so that but little space need here be given to 
the subject beyond what is necessary to point out the 
frequent changes of direction which necessarily accom- 
