498 THE FUNGI WHICH CAUSE PLANT DISEASE 



Fusicoccum Corda (p. 483) 



Stroma subepidermal, several-chambered, erumpent, leathery, 

 black; conidia fusoid, straight and usually large. 



Some forty species, several of which are regarded as conidial 

 forms of Diaporthe and Gnomonia. 



F. veronense Massal on Sycamore and Oak=Gnomonia veneta. 

 See p. 274. 



F. viticolum Red. on grape=Cryptosporella viticola. See p. 280. 



0?^ 



Fig. 343. — F. viticolum, compound pycnidium, germinating spores, pa- 

 raphyses. After Reddick. 



F. amygdali Del. causes a spot disease of almond twigs in 

 Europe. 



F. bulgarium Bub. is described as the cause of a grape disease in 

 Austria.^^ 



F. pemiciosum Briosi & Farm, on chestnut=Melanconis 

 modonia Tul. See p. 281. 



Cytosporella Saccardo (p. 483) 



Stroma tuberculate or cushion-form, immersed, then erumpent, 

 leathery, black, lighter within; conidia clavate or ovate, usually 

 quite small. Some twenty-five species. 



