244 E. A. Vainio, Pyrenocarpeae. 



Ser. A. Perithecium lateribus anguloso-productis. 



23. V. latebrosa Koerb. Thallus laevigatus, obscuratus. Apo- 

 thecia diu thallo obducta. 61. 



24. V. muralis Ach. Thallus inaequalis aut sat laevigatus, 

 pallidior, aut evanescens. Apothecia denudata aut tenuissime thallino- 

 obducta aut subpruinosa. 62. 



Ser. B. Perithecium lateribus haud anguloso-productis. 

 1°. Thallus supra substratum evolutus distinctusque. 

 a. Thallus laevigatus aut rarius sublaevigatus. 



a. Apothecia thallo immersa aut apice leviter 

 emergente. 



f Thallus obscuratus; Sporae parvae. 



25. V. mucosa Wahlenb. Thallus continuus aut raro rimosus. 

 Sporae ellipsoideae. 64. 



35. V. ceuthocarpa Wahlenb. Thallus areolatus aut partim sub- 

 continuus. Sporae p. p. globosae, p. p. ellipsoideae. 72. 



ft Thallus pallidior, cinerascens. Sporae medio- 



cres. 



31. V. polystictoides Vain. Sporae long. O.oie— O.ois mm. 69. 



b. Apothecia verrucas bene prominentes forman- 

 tia vel semiimmersa. 



O Sporae parvae, long. O.oos— O.ois mm. 



29. V. peloclitoides Vain. Thallus obscure cinereus aut cinereo- 



nigricans. 67. 



32. V. sparsiuscula Nyl. Thallus cinereo-glaucescens. 70. 



OO Sporae mediocres, long. O.on — O.025 mm. 



33. V. cinereolurida Vain. Thallus obscure cinerascens. 70. 



34. V. fuscolurida Vain. Thallus lurido-fuscescens. 71. 

 /?. Thallus inaequalis. 



A Apothecia thallo immersa, vertice demum pro- 

 minente. Thallus crassior. 



26. V. subnigricans Nyl. Thallus fuscescens vel fusco-nigri- 



cans. 65. 



30. V. virens Nyl. Thallus subglaucescens. 68. 



AA Apothecia verrucas nudas formantia. Thallus 



tenuior. 



27. V. terrestris (Arn.) Vain. Terricola. 66. 



28. V. trabalis Nyl. Lignicola. 67. 



2°. Thallus endolitheus, calci substrati immixtus. 



