Tab. IV. 



Ijoxogra mille eiisi Irons, t\ A. t\ H, 



a. Rhizome with a barren and a fertile frond, i/g X- 

 h. Portion of fertile frond with non-decurrent sori, 1 X- 

 c. Portion of fertile frond with decurrent sori, 1 X- 



