190 E. A. Vainio, Pyrenocarpeae. 



0.032 — 0.046, crass. O.oio— O.ou mm. Conidia bacilliformia, recta, 

 long. 0.004, crass. O.ooos mm. Gonidia desunt. 



Obs. Lichen atomarius Ach., Lich. Suec. Prodr. (1798) p. 16, 

 „corticem Fraxini in Suecia habitans", secundum specimen orig. in 

 herb. Ach. est Verrucaria populicola Nyl., sporis aciculari-fusiformibus, 

 leviter arcuatis, 3-septatis, apicibus obtusis, long. O.022— O.024, crass. O.oos 

 mm instructa. Aliud specimen ad ramulos Alni crescens, ad Didymellam 

 punctiformem pertinens, non est originale. 



3. C. psilotera (Nyl.) Vain. 



Verrucaria psilotera Nyl. Fl. 1875 p. 14; Vain. Fl. Tav. Or. 

 (1878) p. 121. 



Thallus indistinctus. Apothecia crebra, verrucas for- 

 mantia hemisphaericas, circ. O.100— O.160 mm latas, nigras, 

 opacas, lateribus haud praeruptis. Perithecium hemisphaeri- 

 cum, fuscum, dimidiatum, margine ostiolari haud prominente, 

 ostiolo circ. O.020 mm lato. Paraphyses parce evolutae, sat 

 obsoletae. Asci subcylindrici, membrana modice incrassata. 

 Sporae 8:nae, aciculares, vulgo leviter arcuatae, apicibus sat 

 acutis, long. O.024— O.030, crass. O0015 mm, secundum Nyl. „long. 

 0.030—0.040, crass. O.0015— O.002 mm", 1— 3-septatae. 



Distr. Ad corticem Daphnis mezerei in Vahermaki in 

 Luhanka in Tavastia austr. (Vain.). 



Hyphae fuscae e basi perithecii excrescentes parcae, crass. 

 O.003 — O.0025 mm, crebre septatae, leviter constrictae. Nucleus 

 albidus, haud resinoso-guttulosus, jodo lutescens. Paraphyses 

 long. O.020 — 0.030, crass. O.001 mm, conglutinatae, sat crebre septatae, 

 simplices, sat dissolutae. Asci cylindrico-clavati aut cylindrici, 

 long. O.035 — O.045, crass. O.oos — O.014 mm. Gonidia desunt. 



4. C. sphenospora (Nyl.) Vain. 



Verrucaria sphenospora Nyl. Fl. 1869 p. 412; Norrl. Ber. Torn. 

 Lappm. (1873) p. 346. 



Thallus indistinctus, macula cinerascente indicatus. 

 Apothecia crebra, verrucas formantia hemisphaericas, 

 O.100—O.160 mm latas, nigras, opacas, lateribus sat praeruptis. 

 Perithecium fuscescens, dimidiatum, margine ostiolari haud 

 prominente, ostiolo O.020— O.035 mm lato. Paraphyses parce 

 evolutae, sat obsoletae. Asci ventricoso-clavati aut ellipsoidei, 



