602 THE FUNGI WHICH CAUSE PLANT DISEASE 



Hyphae not inflated 

 Hyphae erect; conidia long- 



catenulate 6. Diplococcium, p. 603. 



Hyphse somewhat decumbent; 

 conidia short-catenulate 



or finally solitary 7. Cladospoiium, p. 606. 



Conidia not catenulate 

 Hyphse beautifully flexuose- 



torulose 8. Polythrincium, p. 603. 



Hyphae not torulose or flexuose 

 Hyphae inflated at tip, branched 9. Pseudobeltrania. 

 Hyphae not inflated, usually 

 short and little branched 

 Conidia merely acrogenous 

 Conidiophores short, 1 or 2- 



septate 10. Fusicladium, p. 606. 



Conidiophores rather long, 



multiseptate 11. Passalora, p. 607. 



Conidia acro-pleurogenous. . . 12. Scolecotrichum, p. 607. 



Conidia capitate 13. Cordana. 



Conidia muriculate or ciliate 



Conidia muriculate 14. Trichocladium. 



Conidia ciliate at apex; fertile and 



sterile hyphae intermixed 15. Beltrania. 



Dicoccum Corda (p. 601) 



Hyphae creeping, chiefly very short, simple; conidia elongate 

 or short-clavate, dark. 

 About a dozen species. 

 D. rosae Bon. produces spots on rose leaves. 



Cycloconium Castaigne (p. 601) 



Hyphse in the walls of the epidermis, dichotomous branched, 

 very fugacious, black; conidia ovoid, solitary. 



There is one species : 



C. oleaginum Cast. Mycelimn circinate, fugacious, black; 

 conidia sessile, ovoid, yellow-green. 



It forms blotches on olive leaves and on peduncles of the fruit 

 in Italy and France and Is somewhat injurious in California.'*^ 



