128 



PEZIZALES 



(m) Paraphyses furcate above; spores 



moniliform, 30-40-celled 

 (n) Paraphyses simple; spores not 

 moniliform 

 (y) Asci many-spored 

 y. Apothecia immersed; thallus without 

 cortex 

 (x) Paraphyses simple, free 

 (y) Paraphyses ramose, united 

 (d) Spores muriform 

 X. Spores hyaline or subhyaline • 

 (x) Apothecia superficial, broad; hy- 



menium with algae below 

 (y) Apothecia immersed, small; no algae 

 below hymenium 

 y. Spores dark 

 (2) Disk small, more or less closed and perl- 

 thecioid; apothecia mostly sunken in 

 verrucae 



(a) Spores 1-celled 



X. Paraphyses simple, free; hymenium per- 

 forate 



y. Paraphyses ramose, united; hymenium 

 not perforate 



(b) Spores 2-celled; paraphyses ramose, 



united 

 b. Asci myriosporous; spores mostly 1-celled 



(1) Apothecia superficial 



(a) Thallus bright yellow 



(b) Thallus not bright yellow 



(2) Apothecia typically immersed, with mostly 



narrow disk 

 2. Thallus with Trentepohlia or Phyllactidium; 

 thalline exciple sometimes disappearing in age 

 a. Thalline exciple present and persistent 



(1) Spores 1-celled, hyaline 



(2) Spores 2-celled 



(a) Spores hyaline 



(b) Spores dark at last 



(3) Spores x-celled 



(a) Spores hyaline 



X. Apothecia proliferating repeatedly from 

 margin, forming erect forking chains 

 of apothecia 

 y. Apothecia not in chains 

 (x) Algae Trentepohlia 

 m. Exciple and hypothecium hyaline 

 n. Exciple and hypothecium dark, hard 

 (y) Algae Phyllactidium 



(b) Spores dark 



(4) Spores muriform 

 (a) Spores hyaline 



X. Paraphyses simple 



Conotrema 140 



Adermatis 226 

 Dyslecanis 226 



Phlyctella 228 

 Phlyctidia 228 



Myxodictyum 227 



Phlyctis 227 

 Diploschistes 141; 31 



Subfamily Pertusariae 



Perforaria 217 



Pertusaria 217; 31 



Varicellaria 220 

 Subfamily Acarosporae 



Pleochroma 229 

 Maronea 215 



Acarospora 216; 31 



Subfamily Gyalectae 



Jonaspis 145 



Lecaniopsis 147 

 Diplopeltopsis 



Polystroma 140 



Ocellularia 137 

 Sagiolechia 145 

 Phyllophthalmaria 139 

 Phaeotrema 137 



