0? BRITISH FUNGI. 153 



274. Eeceptacle cyathiform, horny. Hymenium at 



length breaking up. Ttmpanis, Tode. 



275. Eeceptacle coriaceous, at first closed, covered 



with a thick cuticle. Cenangium, Fr. 



276. Receptacle orbicular, marginate. Asci exploded. 



Ascobolus, Tode. 



277. Eeceptacle orbicular, glutinous within. Hyme- 



niutn smooth. Bulgaria, Fr. 



278. Eeceptacle waxy, gelatinous when moist, sphe- 



rical, fertile all round. Agyrium, Fr. 



279. Eeceptacle obsolete. Hymenium immersed in 



the matrix, orbicular or elliptic. 



Stictis, Pers. 



2S0. Parasitic. Asci forming a thin powdery stratum 

 mixed with jointed threads. 



Ascomtces, Mont, fy Besm. 



Order XXVI.— TUBEEACET. 



Subterranean ; hymenium wavy and packed. 



Genera. 



281. Integument warty or fcuberculate, no definite 

 base. Asci saccate. Sporidia reticulate or 

 spiny. Tubeb, Mich. 



2S2. Integument even. Base definite. A^ci clavate. 

 Sporidia spherical. Ciioiuomtces, Vitt. 



