268 Scott and Sargant.—On the Pitchers of 
It is very desirable that observations should be made on 
some of the other pitcher-bearing species of Dischidia \ which 
seem to be very imperfectly known. 
The comparison of the pitchers in D, rafflesiana with the 
leaves of such species as D. Collyris, Wall. ( — Conchophyllum 
imbricatum , BL), suggested by Beccari, Treub,, and Goebel, is 
most instructive. There is a specimen of D. Collyris in the 
Kew Herbarium which shows a long series of the concave, 
shell-like leaves, each sheltering within its hollowed lower 
surface a mass of adventitious roots. The under-surface of 
these leaves has the purple coloration characteristic of the 
pitchers. We can scarcely doubt that from some such leaves 
as those of D. Collyris , the more highly-modified root-sheltering 
pitchers of Dischidia rafflesiana have been evolved. 
They are enumerated by Beccari, Malesia, vol. ii. p. 260. 
