92 



DOTHIDEALES 



C. Spores x-celled 



1. Spores hyaline 



a. Paraphyses present 



(1) Stroma lichenicole 



(2) Stroma not lichenicole 



(a) Stroma round to oblong 



(b) Stroma linear 



b. Paraphyses lacking 



2. Spores dark 



a. Paraphyses present 



(1) Stroma lichenicole 



(2) Stroma not lichenicole 



(a) Stroma round to oblong 



(b) Stroma linear 



b. Paraphyses lacking 



(a) Stroma round to oblong 



(b) Stroma linear 



D. Spores muriform, dark; paraphyses present 



E. Spores filiform 



1. Paraphyses present 



2. Paraphyses lacking 



a. Asci 8-spored 



b. Asci many-spored 



Epiphora TS 599 



Telimena 16:631, TS 599 

 Exarmidium 24:621, TS 424, 



423 

 Phragmocarpella 24:624, 



TS 601 



Homostegia 2:649; 19 



Dermatodothis 24:625, TS 369 

 Rhopographus 2:647, TS 425; 

 20 



Clypeostroma 24: 628, TS 609 

 Rhopographina 24:625, TS 429 

 Dictyochorella 24:629, TS 610 



Scolecodothis 24:630, TS 412 



Ophiodothella 24:629, TS 611; 



19 

 Myriogenis 14:685 



Family 32. MYRIANGIACEAE 



(Phymatosphaeriaceae) 

 8;843, 11:440, 16:799, 18:191, 22:579, 24:1133; TS 433 



Stroma or ascoma mostly verruciform or pulvinate, sometimes discoid, typically 

 innate, then erumpent, rarely permanently covered or superficial from the first, 

 with an outer more or less differentiated layer or peridium and a central stromatoid 

 mass in which the asci are imbedded singly, and irregularly for the most part; asci 

 in one to several layers and separated from each other by purely stromatic tissue 

 or paraphysis-like filaments; hypothecium merely a part of the ascoma, or parenchy- 

 moid and then more or less diflFerentiated from it; hymenial area occupying all the 

 interior, or definitely localized; asci freed, by the weathering away of the peridium. 



This is one of the most puzzling of groups, and many of the genera can be 

 assigned with equal warrant to families belonging to other orders. The simplest 

 forms, such as Elsinoe and Plectodiscella, are perhaps best referred to the Gym- 

 nascales, while the most specialized are distinguished with difficulty from the 

 Discomycetes. The Saccardiae approach the Agyriaceae closely, and certain genera 

 of the Dothiorae have been assigned to the Patellariaceae. Theissen and Sydow 

 regard this family as directly related to the Dothideaceae, and in spite of a difference 

 of interpretation as to this poinf, it is convenient to include them in the same order 

 on the basis of the stroma. The perithecioid locule of the latter appears to be a 

 very different structure, however, and the order in consequence is best regarded as 

 diphyletic. 



A. Ascoma more or less permanently innate, little 



if at all differentiated Subfamily Elsinoae 



