387 



Pycnia< 



. telia < 



repeating spore 

 heteromorphic 



'tecia cupulate — with eatenulate spores< 



■lecia c«omate — with eatenulate spores < 



^aecia cupulate — with eatenulate spores < 



repeating spores 

 isomorphic 



DIAGRAM 



Showing life history of 59 best known genera of rusts. 



Coleosporium ^ 



Melampsoropsis 



Pucciniastrum 



Melampsoridium 



Melampsorella 



ICalyptospora 

 Cronartium 



tGymnosporangium 

 Nigredo 

 Dicaoma 

 Tranzschelia 

 Eriosporangium 

 Neoravenelia 

 Phragmopyxis 

 Phragmidium 



. Melampsora 



| Cystingophora 



' *Lysospora 



Uromycopsis 



Allodus 



( Earlea 



... . , J Gymnoconia 



with eatenulate spores <! ,. , , 



Xenodochus 



[jTucciniostele 



Ravenelia 



Pileolaria fautceeious 



Uropyxis 



Prospodium 



Triphragmium 



with pedicellate spores< Trachyspora 



Spirechina 



I 



scia caeomate,- 



Gallowaya 

 Necium 

 *Trichopsora 

 *Chrysomyxa 

 *Barclayella 

 Chaconia 

 Cionothrix 

 Alveolaria 

 Baodromus 

 *Didymopsora 

 Dietelia 

 Endophyllum 

 Pucciniosira 

 Dendrcecia 

 Discospora 

 Macalpinia 

 Polythelis 

 Calliospora 

 Nephlyctis 

 Ameris 

 Nyssopsora 

 Polioma 

 Telospora 

 __ Dasyspora 



Kuehneola 

 Argotelium 

 Bullaria 

 Klebahnia 



>heteroecious 



heter. and aut. 



heter. and aut. 



*Not represented in North America. 

 fRepeating spores unknown. 



