Acta Societatis pro Fauna et Flora Fennica, 49, N:o 2. 143 



globosae, circ. 1.2 — 0.3 mm latae. Hyphae crass. O.0025 — O.002 mm, 

 membrana sat tenui, paullo magis incrassata, quam in X. minutula. 

 Verrucae et soralia gonidia pleurococcoidea continent simplicia 

 et saepe glomerulosa. Nucleus albidus, haud resinoso-guttulosus, 

 jodo non reagens. Paraphyses longae, crass. O.0015 mm, simplices, 

 increbre septatae. Asci long. circ. O.090, crass. O.020 mm, mem- 

 brana etiam in apice tenui. Sporae 8:nae aut 4:nae, jam novellae 

 fuscescentes, apicibus obtusis, loculis aeque longis, haud lenticu- 

 laribus, membrana sat tenui, interdum strato gelatinoso tenui 

 indutae. 



3. Leptosphaeria Ces. et de Not. 



Schema Classif. p. 60 (em.); Sacc. Syll. Fung. II (1883) p. 13; 

 Karst. Rev. Ascom. (Act. Soc. F. et Fl. Fenn. II, 1885) p. 21, 51; Win- 

 ter in Rabenh. Krypt.-Fl. Pilz. II (1887) p. 407, 440. Moriola Norm. 

 Bot. Not. 1872 p. 13 (p. p.), 1876 p. 161 (p. p.), Allelosotismus (1872) 

 p. 243 (p. p.); Nyman Bot. Not. 1895 p. 242; Hedl. Bot. Centralbl. 64 

 (1895) p. 376. 



Genus gonidiis destitutum, ad fungos pertinens. Sporae 

 8:nae aut 4:nae, fusiformes aut rarius ovoideae, obscuratae, 

 (2 — ) 3— pluri-septatae, loculis subcylindricis (haud lenti- 

 cularibus). Paraphyses ramoso-connexae aut simplices. 

 Corticola. 



1. L. leucoplaca (Wallr.) Vain. 



Verrucaria leucoplaca Wallr. Comp. Fl. Germ. II t. 3(1831) p. 299 

 (secund. Koerb. Syst. Lich. Germ. p. 361). Pyrenula leucoplaca Koerb. 

 Syst. Lich. Germ. (1855) p. 361; Hepp Flecht. Eur. (1867) n. 957. Verrucaria 

 farrea Nyl. Bot. Notis. 1853 p. 183 (haud Ach., conf. infra), Prodr. Lich. 

 Gall. (1857) p. 434, Exp. Pyrenoc. (1858) p. 47, Lich. Scand. (1861) p. 

 279, Lich. Paris (1896) p. 128. Pyrenula quercus Mass. Mem. Lich. (1853) 

 p. 138 (sec. cit). 



Thallus macula albida indicatus, hypothallo indistincto. 

 Apothecia crebra aut sparsa, verrucas formantia conoideo- 

 hemisphaericas, 0.3 — 0.2 mm latas, atras aut nigricantes, vulgo 

 nitidas, margine ostiolari conoideo-prominente, ostiolo foveo- 

 lato. Perithecium fuscofuligineum, dimidiatum. Paraphyses 

 numerosae, simplices. Asci cylindrici, membrana tenui. 

 Sporae monostichae aut subdistichae, fusiformes, fuscescen- 

 tes, 3 — 5-septatae, loculis haud lenticularibus, long, vulgo 

 O.023 — O.029, crass. O.009 — O.011 mm. 



