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1. Azolla Lam. WATEK-FEBN. 



Sporocarps in pairs. Macrosporangia 1- 

 spored. Aquatics, moss-like, floating, green 

 or purplish. 



1. A. CAHOLINIANA Willd. Presidio. Sau- 

 celito. 



ORDER 2. FILICES. Isosporous. Spor- 

 angia formed from the epidermis, bursting by 

 an elastic ring. Fronds without stipules. Ver- 

 nation circinate. 



Family 1, POLYPODIACEJE. 



Sporangia hypophyllous, somewhat globular; 

 ring vertical. 



1. Gymnogramme Desf. GOLD-FERN. 



Sori linear, placed on branching primary 

 veins. Indusium 0. 1. 



1. G. TRIANGULARIS Kaulfuss. Common. 



2, Cheilanthes Swartz. LIP-FEKN. 



Sori placed separately at the end of veinlets. 

 Spurious indusium rudimentary, formed by the 

 reflexed margin of the frond. 1. 



1. C. CALIFORNICA Nutt. Fronds green on 

 both sides, 4-pinnatifid. Tamalpais. 



2. C. MYRIOPHYLLA Desv. Fronds covered 

 underneath with brown scales; 3-4-pinnate. 

 Wright's Station. 



