DEVELOPMENT OF THE FLOWER. 433 



upper edge, reach the apex of the slender nucellus, and close over 

 it, leaving only a narrow opening, the micropyle. The closure of 

 the inner integument is first completed, then the outer. The 

 inner integument is uniformly thick over the whole nucellus ; the 

 outer is developed only on the free outer side. The nucellus 

 itself is bent in the same manner as the entire ovular rudiment ; 

 the ovule is campylotropous. In flower-buds more than one 

 mm. high the ovular rudiments have well nigh completed their 

 development ; at the apex of the style the stigmatic papillae have 

 already begun to form. The stigmas are commisural, that is, 

 are placed in a plane corresponding to the partition wall (replum). 



28 



