The Fern Lover's Companion 



35 



3. Fruit ill lines on the mar- 

 gin of the pinnules; 

 under surface of the 

 fronds co\'ered w i t h 

 whitish powder. 

 Cloak Ferns, yotholwna. 



B. Indusium Present 



Sori on the edge of a ])in- 

 nule terminating- a ^-ein; 

 sporangia at tlie base of a 

 long, bristle-like recep- 

 tacle surrounded by a 

 c u p-s h a p e d indusium. 

 Filmy Fern. Tricho- 



ma ries. 



2. Indusium formed by the reflexed 

 margin of the pinnules. 



(1) Sporangia on a continuous line; 

 fronds large, ternate; indusium nar- 

 row. Bracken. Brake. Pteris. 



