H DEVELOPMENT OF THE FLOWER 
11, Vertical view of placenta, tending to be divided 
opposite to the ventral suture. See a. 
Results. 
1. Process of connectif and of apex of the cells of the 
anthers, a result of ulterior development. 
2. Formation of the parent cells of pollen grains in a 
grumous mass, filling the locellus of anthers, and 
scarcely separable from it. 
3. Formation of the ventral suture by a carrying down 
of one side of a central opening! 
4. Development of placente even at a very early pe- 
riod, independently of any inflection of ventral 
suture : 
* 
RoxsuncHiA ViniDIFLORA.—( Continued.) Pl. xvi. 
A. 1, Transverse section of anther. 
. 2, Separable mass of locelli of same, 1. M. 
3. Nucleary young parent cells, 1. 
2. Portion of the contents of the iela, now easily 
separable, ł. 
3. Parent cells, 4 1$ 
4. Do. one after nitric acid, ; is. 
4. a. Ditto ditto, and iodine, 5. 
5. Pistillum. 
6. Ventral face. 
7. Dorsal face, now presenting a broad suture. 
8. Long central section of the same. 
9. Vertical section of placentze. 
10. 11. 12. Ovula. : 
C. 1. Transverse section of the anther; the parent grains 
are now separating in the fluid under the field of 
the microscope. 
