FLORAL ORGANS. 439 
the carpels, sometimes as a result of injury from in- 
sects or fungus, at other times without assignable 
cause. 

Fie. 208.—lLeaves of horse-chestnut, Hseulus, showing passage from 
“digitate to pinnate leaves. 
In the case of inferior ovaries this lengthening 1s, 
perhaps, even more common, as in Umbellifere, Com- 
posite, &e. The common groundsel (Senecio vulgaris) 
is especially liable to this form of enlargement of the 
