HYALODIDYMAE— PHAEODIDYMAE 31 



y. Paraphyses present 



(x) Spores with a mucous layer produced into a spathulate ring 



Pteridiospora 14: 539 

 (y) Spores without a mucous layer 

 m. Spores ellipsoid to fusoid Melanopsamma 1: 575 

 n. Spores botuliform Thaxteria 9: 687 



(b) Asci 16-spored Pseudolizonia 9: 682 



(2) Perithecia with hairs or bristles 



(a) Paraphyses lacking 



x. Perithecia lichenicole Echinothecium 16:484 



y. Perithecia typically on leaves, rarely on stems 



Venturia 1 : 586 



(b) Paraphyses present Eriosphaeria 1: 597 



II. Perithecia cespitose Othiella 1: 739, 17: 662 



III. Perithecia in, or rarely upon, a stroma 



1. Stroma scanty 



a. Perithecia smooth Gibbera 1: 599 



b. Perithecia setose Cacosphaeria 9: 699 



2. Stroma well-developed 



a. Stroma white or colored 



(1) Stroma white and soft Melchiora 14: 538 



(2) Stroma bright yellow Endothia 1: 601 



b. Stroma black, rarely yellowish 



(1) Perithecia botryose, erumpent, superficial 



Myrmaecium 1 : 600 



(2) Perithecia immersed 



(a) Spores septate near the base Aplacodina 16: 485 



(b) Spores septate near the middle 

 x. Stroma valsa-like 



(x) Conidial stage Melanconium 



Melanconis 1: 602 



(y) Pycnidial stage Rabenhorstia 



Hercospora 1: 605 



(z) Pycnidial stage Phoma Diaporthe 1:606 



y. Stroma eutype-like or diatrype-like 



Euporthe 1: 631, 1: 662 



Phaeodidymae 



1: 701,9: 723, 11: 3I-- M: 55i. 16: 408, i-: 675 



Spores i-septate, dark, fuliginous to brown, ovoid, oblong or fusoid 



I. Perithecia separate 

 1. Perithecia covered 



a. Paraphyses lacking Phaeosphaerella 9: 723 



(inch Lizonia 1: 574) 



b. Paraphyses present 

 (1) Asci 8-spored 



(a) Spores surrounded by a hyaline sheath 



Massariella 1 : 716 



