* LJ 
62 : DEVELOPMENT OF THE FLOWER 
9a. Under surface of ditto. 9b oblique section of an 
ngle and very young gland. 
10. 11. 12. Evolution of the ovule. 
CALOTROPIS Procera, —( Continued.) Puate xxvii. (H.) 
1. Corona staminea, expanded flower. 
2. Inner view of anther. 
3. Pollen mass. 
4. Mode of union of neck of pollinia and crus of gland. 
5. Portion of pollen mass, shewing that it is a mem- 
branous sac containing simple pollen grains. 
6. Pollen grains. 
7. Membrane of ditto burst. 
8. Transverse section of stigma about its neck, and of 
the anthers. 
9. Another section lower down the fissures now do not 
communicate with the stigmatic tissue. | 
10. Section transverse of styles just where they unite, 
each has its own canal; the central þerforatiot 
shews the adhesion not to be complete. 
11. One of the above almost entirely stigmatic, radiating 
from the canal. 
12. Ditto of style where quite distinct, conducting canal 
with lax tissue. 
13. Tissue of conducting canal. 
14. Upper surface of stigma to shew the different ap- - 
` pearance of the margins and disc itself. 
15. Under ditto of stigma, shews that the stigmatic tis- 
sue is most developed on that part of the surface 
tending to the styles, and least opposite the faces 
of the anther. 
.. 16. Portion of stigma one of the angles, still stigmatic. 
17. Ovulum. 
April 19th, 1841. 
Catotropis Procera,—( Continued.) Pl. xxvut. (I.) 
1, Long double section of genitalia, during expansion. 
