HYSTERIACEAE 103 



in all of these, and have in consequence received widely varying treatment at the 

 hands of different workers. 



The Hysteriaceae have apparently been derived directly from the Sphaeriaceae 

 and hence represent a second line of evolution connecting Pyrenomycetes with 

 Discomycetes. The carbonous forms with narrow cleft are essentially elongate 

 perithecia, while the membranous ones with wider opening pass imperceptibly 

 into Phacidiaceae and Tryblidiaceae. 



Hyalosporae 



2:721, 9:1100, 11:385, 14:710, 16:657, 22:557, 24:1112 



Spores 1-celled, hyaline or subhyaline, ovoid to oblong 



A. Paraphyses present Hypodermella 11:385 



B. Paraphyses lacking Bifusella 24:1257 



Phaeosporae 



2:727 

 Spores 1-celled, dark, ovoid to oblong 



Apothecia superficial on a subiclc; paraphyses 



present Farlowiella 2:727, 9:1100 



Hyalodidymae 



2:727, 9:1101, 11:388, 14:711, 16:659, 17:895, 22:558, 24:1112 

 Spores 2-celled, hyaline or subhyaline, ovoid to fusoid 



A. Apothecia membranous 



1. Apothecia innate, more or less concrete with 



the epiderm Hypoderma 2:784, R 29, 31; 22 



2. Apothecia erumpent to superficial 



a. Apothecia typically oblong, opening by a cleft Aulographum 2:727, R 4, 8; 22 



b. Apothecia typically rounded, opening by lobes Schizothyrium 2:722, R 63, 75 



B. Apothecia carbonous, erumpent or superficial; 



subiculum more or less developed Glonium 2:731, R 4, 10; 22 



Phaeodidymae 



2:740, 9:1103, 11:387, 14:711, 16:659, 17:897, 22:561 

 Spores 2-celled, dark, ovoid to fusoid 



A. Apothecia carbonous, conchiform; cleft narrow 



and straight Bulliardella 17:902 



Hyalophragmiae 



2:765, 9:1112. 11:388, 14:715, 16:664, 17:903, 22:565, 24:1113 

 Spores x-celled, hyaline to subhyaline, oblong to cylindric 



A. Apothecia parasitic, densely gregarious or cespi- 



tose 



1. Apothecia densely gregarious, corticole; spores 



long 1- or 2-celled Dichaena 2:771, R 49; 22 



2. Apothecia radiately disposed, folicole Aldona 16:667 



B. Apothecia saprophytic 



1. Apothecia membranous or corious, innate 



a. Apothecia membranous; cleft narrow Gloniella 2:765, R 29, 35; 22 



b. Apothecia corious; cleft gaping Pseudographis 2:769, R 90, 94; 



22 



2. Apothecia carbonous, superficial; cleft narrow Hysteroglonium 



