Order V. PBRISPORIACE^. 



Perithecia subglobose, always closed except by decay, mostly 

 membranaceous, nucleus never difQuent. — Berkeley Outlines. 



Many of the species are parasitic on living leaves. The 

 genera included and found in our Valley are as follows : 



Uncinula. 



Phyllactinia. 



Sph.erotheca. 



MlCROSPH^RIA. 



Erysipb and Krotium. 



Genus XIII. SPH^R.OTHBCA. Lev. 



Mycelium spiderweb, conceptacles globular, containing a 

 single sporangium, appendages numerous, fioccose. 



S. pannosa. Rose Blight. 



Mycelium, thick, woolly ; conceptacles globose, white ; 

 sporangium many spored. 



Common on our yellow rose bushes. 



Genus XIV. PHYI,!, ACTINIA. Lev. 



Perithecia round, seated on a granular receptacle ; appen- 

 dages straight, ascicular, at length bent back. 



P. guttata. 



Aniphigamous, mycelium web-like, conceptacles large, 

 round, appendages hyaline. 



On different species of deciduous undershrubs. This is the same 

 species as the Phyllactinia suffulta, Reb. 



202 



