30 



Gaudex arborescent ; indusium globose, ulti- 

 mately rupturing at the apex so as to form a 

 cup holding the sorus. 



Cyathea spinulosa Wall. 

 A tall tree-fern. Stipes and main rachis 

 armed with sharp elevated points. Fronds 



spi 



(a) A pinnule (nat. size). (b) Portion of pinnule (x 3). 



(c) Portion of segment with a sorus (magnified about 15 times) 



(d) Portion of rachis. (e) Sporangium (magnified). 



