PliORAL ORGANS. 



439 



the carpels, sometimes as a result of injury from in- 

 sects or fungus, at other times without assignable 

 cause. 



Fia. 208. Leaves of horse-chestnut, Mneulus, showing passage from 

 digitate to pinnate leaves. 



In the case of inferior ovaries this lengthening is, 

 perhaps, even more common, as in UmbelUfercPi Com- 

 positcey &c. The common groundsel (Senecio vulgaris) 

 is especially liable to this form of enlargement of the 



