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 Delphiniwm elatum. 
Fic. 144.—Section through marginal lobe of carpel (Delphiniwm), show- 
ing the nucleus (7). 

Fig. 145.—Section through marginal lobe of carpel, showing nucleus 
and tegument (Delphiniwm). 
One of the most singular instances of ovular mal- 
formation on record is that cited by the Rey. 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 
