86 



SPHAERIALES 



y. Paraphyses lacking, or soon disappear- 

 ing 

 (x) Asci 1-8-spored 



m. Algae present in the perithecium; 

 spores muriform 

 (m) Spores hyaline 

 (n) Spores dark 

 n. Algae not present in perithecium 

 (m) Spores 1-celled 



r. Spores globoid to elLpsoid 

 (r) Perithecia immersed 

 (s) Perithecia more or less super- 

 ficial 

 h. Spores hyaline 

 i. Spores dark 

 s. Spores vermiform, clavate at each 

 end 

 (n) Spores 2-cellcd, hyaline 

 (o) Spores x-celled, hyaline 

 (p) Spores muriform 

 r. Spores hyaline 

 s. Spores dark 

 (y) Asci many-spored; spores 1-celled, 

 hyaline 

 (c) Algae Trentepohlia 

 X. Perithecia upright, with vertical ostiole 

 (x) Paraphyses simple, free 

 m. Perithecia with stiff fascicled hairs 

 n. Perithecia glabrous 

 (m) Asci 4-8-spored 



r. Spores 1-celled, hyaline 

 s. Spores 2-celled 



(r) Spores hyaline; cells separat- 

 ing or not 

 (s) Spores dark 

 t. Spores x-celled 

 (r) Spores hyaline 

 (s) Spores dark 

 U. Spores muriform 

 (r) Spores hyaline 

 (s) Spores dark 

 V. Spores acicular to filiform 

 (r) Asci evanescent 

 (s) Asci persistent 

 h. Perithecia immersed 

 i. Perithecia more or less super- 

 ficial 

 (n) Asci many-spored; spores hyaline 

 r. Spores 1-celled 

 s. Spores 2-celled 

 t. Spores x-celled 

 (y) Paraphyses branched and united, 

 rarely lacking 

 m. Ostiole round or dot-like 



Willeya 68 

 Staurothele 68 



Lithoecea 67 



Verrucaria 66; 18 

 Phaeosporis 67 



Sarcopyrenia 66 

 Thelidium 67 

 Phragmothele 68 



Polyblastia 68 

 Sporodictyum 



Trimmatothele 67 



Subfamily Pyrenulae 74 



Stereochlamys 81 



Coccotrema 78 



Diporina 79 

 Dipyrenis 80 



Porina 78 

 Pyrenula 80; 18 



Clathroporina 80 

 Anthracothecium 81 



Belonia 79 



Rhaphidyllis 79 



Rhaphidopyris 79 



Holothelis 79 

 Dithelopsis 80 

 Thelopsis 79 



