GLCENOSPORIUM. 20I 



This fungus is the greatest enemy to the fruit growers, since when a 

 tree is attacked it means death to that tree and all surrounding trees. 



There is no preventive except to watch and destroy the first appear- 

 ance of the myceliutn swelling, removing the branch and burning it 

 immediately. It will not do merely to cut it and leave the branch on the 

 ground, for the conidia and sporidia will ripen the same as if left on the 

 tree. The watchword ought to be " remove and cremate." 



Genus XI. MBI<OGRAMMA. Tul. 



Stroma subglobose, depressed, cellular ; perithecia immersed, 

 adnate ; sporidia linear, lanceolate, or ovate, pleurilocular or 

 simple. 



M. gyrosum. Tul. 



Spermog^onia, very tninute. 



Ascophore, round, confluent, orange, stroma yellowish ; 

 perithecia spiral, pulverulent. 

 Sporidia, linear. 

 Also called Eudothia gyrosa, Fr. 

 On bark of cornus florida. 



Genus XII GI/G^NOSPORIUM. 



Perithecia imbedded in black bands, surrounding the twig. 

 Sporidia oozing out of the stroma in the form of tendrils. 



G. Curtisii. 



Common on maple twigs, to the injury of young maple trees. 



