iS 4 



THE AZOLLAS. 



California only, but is often abundant 1 there. It has the 

 same habitat as our common species and appears to 

 thrive in cultivation. Mr. Eaton states that he has seen 

 ditches in California covered two inches deep by the 

 multitudes of this plant. 



A zolla Filic ?t 'o ides, 

 (Enlarged.) 



