OF THE OVULES. 



267 



from the modified lobes of the carpellary leaf. Figs. 

 143 145, copied from Cramer, show how the nucleus 

 of the ovule is formed as a new growth from the 

 surface of the lobes of the leaf in Del^phinium elatum. 



Fia. 144. Section through marginal lobe of carpel {Delphinium), show- 

 ing the nucleus (n). 



Fio. 145. Section through marginal lobe of carpel, showing nucleus 

 and tegument {Delphinium). 



One of the most singular instances of ovular mal- 

 formation on record is that cited by the Rev. M. J. 

 Berkeley, in the ' Gardeners' Chronicle,' September 

 28th, 1850, p. 612. The plant was a carnation, and 

 its placenta bore, not only ovules, but also carpels (fig. 

 146), the latter originating in a perverted development 



