Mosses and Lichens 



Equisetum arvense. Nat. 

 size Vernal spore-bearing 

 shoot with whorls of scale- 

 like leaves. Asexual gen- 

 eration. 



Equisetum arvense. Natural size Summei sterile 

 shoot with whorls of branches bearing scale-like 

 leaves. 



Single spore- 

 bearing scale, 

 from 3. 



Spore with ela- 

 ters coiled. 



Fertile cone 

 from 2. 



Spore with elaters 

 expanded 



