THE FUNGI WHICH CAUSE PLANT DISEASE 655 



EIey to Geneha of Tuberculariaces-Dematise-AmerospoTffi 



Conidia not in chains 

 Sporodochia not setose 

 Conidiophores lacking 



Lichenicolous 1. Spilomium. 



Not lichenicolous 

 Sporodochia gelatinous; conidia 



globose, vesiculosa 2. Myriophysa. 



Sporodochia not gelatinous 

 Sporodochia hemispheric, with a 



stratum of conidia 3. Spennodennia. 



Sporodochia disk-like, applan- 



ate 4. Sclerodiscus. 



Conidiophores present 



Sporodochia thick, tremeUoid 5. Epidochium, p. 656. 



Sporodochia not tremelloid 

 Conidiophores with a slender 

 apical appendage; conidia ^o- 



bose 6. Bonplandiella. 



Conidiophores not appendaged 

 Conidia globose 

 Sporodochia cellular, uniform 7. Epicoccum, p. 656. 

 Sporodochia of three hyphal 



layers 8. Triplicaria. 



Conidia ovoid to bacillar 

 Conidiophores bacillar; sporo- 

 dochia subdiscoid 9. Hymenopsis. 



Conidiophores branched 

 No brown radiate hyphse at 



base 10. Strumella, p. 656. 



Brown radiate hyphae at 



base 11- Astrodochilum. 



Sporodochia ciliate or with exserted hyphae 

 Sporodochia with loose exserted co- 

 nidiophores, verruciform 12. Trichostroma. 



Sporodochia margins with hairs or 

 setae 



Setae dark 13. Chaetostroma, p. 656. 



Setae or hairs white 14. Myrothecium. 



