30 
Caudex arborescent ; indusium globose, ulti- 
mately rupturing at the apex so as to forma 
cup holding the sorus. | 
Cyathea spinulosa Wall. 
A tall tree-fern. Stipes and main rachis 
armed with sharp elevated points. Fronds 
F1G. 7.—Cyathea spinulosa Wall. 
{@) A pinnule (nat. size). b) Portion of pinnule (* 3). 
c) Portion of segment with a sorus (magnified about 15 times) 
(4) Portion of rachis. (e) Sporangium (magnified). 
