certain Species of the Genus Christisonia . 133 
portions of it, and have the ordinary collateral arrangement. 
The scale-leaves here are densely imbricated. 
The stems of some plants of C. neilgherrica , Gardn., are 
remarkably swollen in places. In a section this is seen to be 
due to a great extension of the ground-tissue resulting from 
continual division of the parenchyma-cells, which at first 
appears to take place on one side of the stem only through- 
out its whole diameter. The bundles of the cylinder send 
branches into the newly-formed tissue ; and when this portion 
of the stem has at length attained a considerable diameter, 
strands of xylem-elements are seen ramifying in all directions, 
not only in the outer portion of the ground-tissue, but also 
between the greatly enlarged bundles and throughout the 
pith. Thus the structure no longer bears any resemblance to 
that of the ordinary stem and presents a very peculiar ap- 
pearance. 
One distinguishing feature of this plant is the presence of 
two opposite bracteoles (prophylls) on the pedicel. The limb 
of the corolla is more spreading, nor have any of them the 
curious spur-like prolongation of the connective so charac- 
teristic of C. subacaulis , Gardn., the connective being here 
simply produced at the base into a short curved point. An 
interesting drawing of C. Stocksii is given by Sir. W. Hooker x , 
showing the structure of the anther, which is of the type here 
described in its dehiscence, and the character of the spur. 
The structure of the stigma, again, is of quite a different type : 
we have seen that it is not an expanded surface, as in the 
others, but clavate in form, the style, moreover, being hooked at 
the apex. The ovary differs from that of the other species in 
being bilocular below and unilocular above ; in the latter case, 
the basal part of the placenta projects far further into the cavity. 
The presence of bracteoles, the structure of the anther, the 
stigma, and the ovary, respectively, are the chief characters 
by which this plant may be distinguished from the other two 
species. Gardner 2 states that it differs from the Ceylon 
1 Hooker, leones Plantarum, Vol. ix. tab. 836. 
2 Gardner, loc. cit. 
