11 



Sfroma superficial, effused, perithccia immersed with 



elongated necks. Bolinia. 



SUBORDER HYSTERIACEAE- 



A. Suoridia hyaline. 



* Sporidia continuous. 



Perithecia subcarbonaceous, flattened or convex, 



minute. Schizothyrium. 



** Sporidia uniseptate. 

 Perithecia meuibranaceous, minute, simple or 



branched, flattened. Aylographum. 



Perithecia carbonaceous, simple or obscurely 



branched. Glonium. 



Perithecia stellate. Actidium. 



Perithecia subcarnose. Angelina. 



*** Sporidia 3-pluriseptate. 



Perithecia carbonaceous. Gloniella, 



Perithecia subcoriaceous. Dichaena. 



**** Sporidia muriform. 



Perithecia carbonaceous (Gloniopsis.) 



***** Sporidia filiform. 



(a) Sporidia much shorter than the ascus. 



Perithecia membranaceous, flattened. Hypoderma. 



(b) Sporidia nearly as long as the ascus. 



Perithecia elongated, flattened, Miernbranaceous. Lophodermium. 



Perithecia elongated, conchiform, subcarbonaceous. Lophium. 

 Perithecia elongated, coriaceo-subcarnose. Clithris. 



Perithecia subsphaeroid. Ostropa. 



B. Sporidia brown. 



Sporidia uniseptate. 



Perithecia coriaceous, widely dehiscent. Tryblidium 



Perithecia elongated, coriaceous. (Lembosia.) 



** Sporidia 3-phiriseptate. 



Perithecia carbonaceous. Hysterium. 



Perithecia coriaceous. (Tryblidiella.} 



Perithecia conchiform. Mytilidion. 



Perithecia subcarbonaceous, striate. Ostreion. 

 *** Sporidia muriform. 



Perithecia carbonaceous. Hysterographium. 



