162 Mr Yapp, On Plants from the Malay Peninsula. 



two curious epiphytic Ferns, Lecanopteris carnosa, Blume, J 

 Polypodium sinuosum, Wall. <,nd 



The stems of Lecanopteris form a thick crust, often 3 on 

 long and a foot or more thick, on the branches of trees. 4 is 

 Fern grows only on mountains of a considerable height; while 

 smaller Polypodium is found creeping on tree-trunks, often v 

 little above sea-level. v 



Both of these remarkable Ferns may be classed amongst h 

 so-called ' myrmecophilous ' plants, as they agree in possessii: 

 thick, fleshy rhizomes, which, except in the very youngest part 

 contain numerous hollows in the form of continuous gallerif 

 which are invariably inhabited by colonies of ants. 



These galleries are formed in both cases by the breakir 

 down of a large-celled, thin-walled tissue, and are not excavate 

 by the ants themselves, though the latter do occasionally tunne 

 out short passages leading from the galleries to the exterior. 



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