K) 



(iROll'S OF SPORE-FORMS 



The relations of the various groups to one another are 



represented in the following diagram. The circle represents 

 the Eu-form8; the substitution of any one chord in the place 

 of tin' arc which it subtends shows how the life-history is 

 short, ned in the other eases. Only the abnormal Endophyllum 

 cannol be Included in such a scheme; it> spoiv-^ruuping could 



only be represented by the symbol O TTT f • 



basidium 



teleutospore 



uredospore 



ft 



o 



uredospore 



basidiospore 



mycelium 



mycelium 

 aecidiospore 



fusion-cell 



