66 



SPHAERIALES 



(1) Perithecia concentric in groups between 



bark and wood 



(2) Perithecia not in concentric groups 



(a) Asci 8-spored 



X. Paraphyses present 

 y. Paraphyses lacking 



(b) Asci many-spored 

 b. Perithecia not beaked 



(1) Perithecia with clypeus or epistroma 



(a) Perithecia with clypeus 



X. Spores appendaged both ways; ostiole 



oblique 

 y. Spores not appendaged; ostiole straight 



(x) Paraphyses present 



(y) Paraphyses lacking 



(b) Perithecia with 5-6-radiate epistroma 



(2) Perithecia without clypeus or epistroma 



(a) Perithecia setose, often about apex only 



(b) Perithecia not setose 



X. Spores with mucous sheath or appen- 

 dages 

 (x) Spores with mucous sheath 

 (y) Spores caudate at each end 

 y. Spores without sheath or appendages 

 (x) Paraphyses present 

 m. Perithecia cespitose, carbonous 

 n. Perithecia sparse to gregarious, typi- 

 cally membranous 

 (m) Perithecia with long branched 



hairs; typically lichenicole 

 (n) Perithecia glabrous 

 r. Perithecia lichenicole 

 s. Perithecia not lichenicole 

 (y) Paraphysoids present 

 m. Perithecia lichenicole 

 n. Perithecia not lichenicole 

 (m) Asci few, ovoid 

 (n) Asci many, clavate-cylindric 

 (z) Paraphyses and paraphysoids lacking 

 2. Perithecia superficial 



a. Perithecia beaked 



(1) Spores expelled in a mucous mass 



(2) Spores not expelled in a mucous mass 



(a) Perithecia setose; paraphyses lacking 



(b) Perithecia glabrous; paraphyses present 



b. Perithecia not beaked 



(1) Perithecia setose or hairy 



(a) Paraphyses present 



(b) Paraphyses lacking 

 X. Perithecia lichenicole 

 y. Perithecia insecticole 



z. Perithecia foli-caulicole, sometimes col- 

 lapsing 



Cacosphaeria 9:699 



Pseudodiaporthe 22:388 

 Gnomonia 1:561; 11 

 Rehmiella 9:675 



Plagiostigme 



Stegophora 

 Hypospilina 2:190 

 Periaster 



Venturia 1:586; 11 



Massarinula 14:536 

 Ceriosporella 



Otthiella 1:739, 17:662 



Arcangelia 9:696 



Didymellopsis 17:657 

 Didymella 1:545; 11 



Polycarpella 



Wettsteinina 22:406 

 Pseudosphaerella 24:631 

 Mycosphaerella 1:476; 9:659; 11 



Spumatoria 16:1134 



Chaetolentomita 24:1072 

 Lentomita 1 :584 



Gibbera 1:599 



Echinothecium 16:484 

 Cantharosphaeria 24:923 



Coleroa 



