82 Mr. Griffith on the Development of 



marked down several points for particular study at Mergui during the rainy 

 season ; but it is now very probable that a considerable time will elapse before 

 I can recur to this very interesting subject. A pai-ticular series of observa- 

 tions is required as to the precise mode in which the radicle, or seminal 

 sucker as it may be called, of the young parasite, as well as those of the 

 lateral shoots, reach the surface of the wood. Observations on those species 

 of Viscum which have a plurality of embryos, and on the exact mode of 

 adhesion of this genus to the stock, will likewise afford many interesting par- 

 ticulars. 



EXPLANATION OF THE PLATES. 

 Tab. IV. 



Fig. 1. Longitudinal section of an ovarium of Lor ant hus Scurrula. 



a. Parietes of the calyx, h. Bases of two petals remaining, c. 

 Ovarium, d. Its upper portion, where it is continuous with the 

 tissue of the style, e. Central, transverse, opake, linear spot, the site 

 of the future excavation. 



Fig. 2. a. Parietes of the calyx, b. Commencement of the viscous tissue, 

 c. Ovarium, d. Its upper portion, which is now traversed by a 

 brown line passing through the centre of the style; the adjacent 

 tissue being sphacelated, e. Extension of the sphacelated line trans- 

 versely. The excavation has just commenced. 



In one instance the tissue of the sucker was prolonged downwards between the wood and bark of the 

 stock. The centre of this prolongation was occupied by a ligneous fascicle. 



To show the fact of a non-continuity of tissue, the section must always be carried through the 

 centre of each sucker, and the branch to which it is applied. As these suckers have not a linear but 

 a discoid attachment, a lateral section will give the appearance of an intermixture of fibres. 



Fig. 2, 3 & 4. are taken from the same species. I have verified the above in one species belonging 

 to the section Scurrula, from which the sketches were taken, and in one of the section Symphyanthus. 



Tab. VIII. fig. 5 & 6. represents a young plant of a species of Loranthus, attached by a broad base 

 to an elevation of corresponding breadth of the branch, which, however, it overlaps : see fig. 7. The 

 elevation visible in the branch is produced by the passage of the roots of the parasite under the bark. 

 They expand so as to form what the French term a. pdted'oie. Here, again, the roots do not penetrate 

 beyond the original attachment. 



