HYSTERIACEAE 57 



b. Perithecia smooth 



(i) Perithecia covered by the epidermis 



Hypodermopsis 17:908 



(2) Perithecia erumpent or superficial 



(a) Perithecia carbonous Hysterium 2: 743 



(b) Perithecia coriaceous Tryblidiella 2: 757 

 2. Asci many-spored, perithecia subcoriaceous 



Baggea 2: 760 



II. Edges of cleft very thin, closely connivent 



1. Asci 4-spored; perithecia subcarbonous, striate 



Ostreium 2: 765 



2. Asci 8-spored; perithecia somewhat membranous, fragile 



Mytilidium 2: 760 



Hyalodictyae 



2:772, 9:1116, 11:389, I4:/I7, 16:668, 17:909 

 Spores muriform, hyaline, ovoid to oblong 



I. Perithecia separate 



1. Perithecia carbonous, erumpent; spores without mucus 



Gloniopsis 2: 772 



2. Perithecia membranous, innate; spores with mucus sheath 



Hysteropsis 9: 1118 



II. Perithecia in a lenticular, radiate stroma Mendogia 16:669 



Phaeodictyae 



2 : 776, 9:1119, 11 : 389, 14 : 717, 16 : 668, 17 : 912 

 Spores muriform, dark, ovoid to oblong 



I. Perithecia carbonous or corneo-carbonous, firm 



Hysterographium 2:776 



II. Perithecia membranous, thin Graphyllium 16: 1145, 17: 913 



Scolecosporae 



2:784,9:1123, 11:389. 14:719, 16:669, 17:913 



Spores bacillar to filiform, hyaline or dark 



I. Spores 2-5 times shorter than the asci ; perithecia membranous 



Hypoderma 2: 784 



II. Spores filiform, nearly as long as the asci 



1. Perithecia horizontally elongate, rarely ampulliform 



a. Perithecia elongate 



(1) Perithecia membranous, applanate Lophodermium 2:791 



(2) Perithecia subcarbonous, conchiform 



Lophium 2: 799 



(3) Perithecia subcoriaceous, depressed 



(a) Perithecia subcorneous Sporomega 2:801 



(b) Perithecia subcarnose Colpoma 2:803 



b. Perithecia subspheroid or ampulliform 



(1) Perithecia depressed spheroid, cleft longitudinal 



Ostropa 2: 804 



