named Rafflesi a. ;.'>; 



Plate XVII. 

 The underside of the same Bud ; to show the root, the reticulata 

 base with the circular elevation in which it terminates, and 

 the origin of the outer b actca\ Natural size. 



XVIII. 



A Flower-bud, of which the bractese, whose insertions are shown, 

 are removed. Natural size. 



XIX. 



A different view of the Bud in the same state, to show the aesti- 

 vation and veins of the segments of the perianthium. Na- 



tural size. 



XX. 



Fig. 1. A vertical section of the Bud deprived of its bracteffi : 

 exhibiting the principal vessels of the column and pe- 

 rianthium, and the structure of the root, especially the 

 change in the direction, increased ramification and 

 termination of its vessels at the base of the parasite. 

 Natural size. 

 2. One half of the vertically-divided perianthium of the 

 same Bud, in which the internal surface of the tube, 

 corona and segments is shown. Natural size. 



XXI. 



Fig. 1. A Flower-bud, its bracteae and perianthium being re- 

 moved, to show the column with the two annular pro- 

 cesses at its base. Natural size. 



2. A portion (about f) of the column, of which part of the 



limb is removed, to show the cavities of the neck, into 

 which the antherae are received. Natural size. 



3. The portion of the Limb removed from fig. 2. with its an- 



therae immersed in their proper cavities. Natural size. 

 vol. xiii. 2 h Fig. 



