Two Malayan ‘ My rmecophilous ’ Ferns, Poly- 
podium (Lecanopteris) carnosum (Blume), 
and Polypodium sinuosum. Wall, 
BY 
R. H. YAPP, B.A. 
Frank Smart Student, Gonville and Cams College, Cambridge , and 
Assistant Curator of the University Herbarium. 
With Plates X, XI, and XII. 
Introduction. 
I N Hooker’s ‘ Species Filicum/ 1 published in 1864, occurs 
the following passage : — 
‘ Notwithstanding the striking difference between the fronds 
of this remarkable plant (. Polypodium lomarioides , Kze.) and 
those of Polypodium sinuosum , Walk, I am disposed to think, 
from the nature of the caudex and the venation, that these 
two may prove not specifically different. On mentioning to 
Mr. J, Smith my views regarding the unity of these two very 
distinct-looking Ferns, he not only was disposed to agree with 
me, but suggested that another Fern, viz. Lecanopteris carnosa , 
Blume, universally looked upon as a distinct genus, was 
equally an abnormal form of our present Polypodium , and 
1 Hooker (’ 64 ), p. 79. 
[Annals of Botany, Vol. XVI. No. LXII. June,igo2.1 
O 
