36 



Sori marginal ; indusium more or less two 

 valved ; receptacle elongated, columnar, pro- 

 truding beyond the mouth of the indusium or 

 included within it. 



Hymenophyllum polyanthos Sw. 

 Stipes 2-3^ inches long, wingless or narrowly 



FIG. 10. HymetiophyUutn polyanthos Sw. 

 (a) Pinna (x 7). 

 Ib} A sporangium (magnified). 



