OF THE COMMON MIGNIONETTE. 99 



junction. This apparently originates in the union of the two glandular 

 stipules seated at the base of the leaves of this genus, and which 

 may also be seen to accompany the scale-like leaves on the central 

 bud within. 



Figs. 23. to 25. Interior views of metamorphosed pistils, in which 

 the ovules are seen transformed to leaves, and the glandular stipules 

 are all that remain of the leaves which should compose the central 

 bud, their limbs having entirely disappeared. 



Fig. 26. The appearance of these stipules on a leaf-bud, develop- 

 ing under ordinary circumstances. 



Fig. 27. One of them more highly magnified. 



Figs. 28. 29. Their appearance on the small scale-like leaves of the 

 central buds in fig. 21, 22. 



Fig. 30. Similar to fig. 23, but without any appearance of the 

 transformed ovules; the glandular stipules are seen in the bottom of 

 the ovarium. 



These glandular bodies assume a very prominent character in the 

 anatomy of the metamorphosed pistils, and I was for some time 

 puzzled to account for them, thinking that they might represent an 

 altered condition of the ovules. I believe however that I have rightly 

 considered them as the only representatives of the various leaves which 

 would have made their appearance on the branch if the bud had 

 developed in the ordinary way. They do not appear to diminish in 

 size though the limb of the leaf has disappeared. 



Fig. 31. Four pedicillated semitransformed ovules, seated on a pla- 

 centa of a pistil metamorphosed similarly to that in fig. 9- 



Figs. 32. to 35. Other appearances of a similar kind, all representing 

 various approaches of the ovules to a foliaceous character. The little 

 theca-shaped appendages are hollow, with a perforation at their apex, 

 representing the foramen. 



