54 E. A. Vainio, Pyrenocarpeae. 



dispersa, thallo subimmersa aut semiimmersa et verrucas 

 hemisphaericas, nigras vel fusconigras, nudas formantia. 

 Perithecium subhemisphaericum, 0.6— 0.7 mm latum, fusco- 

 fuligineum, integrum, superne crassum, basi tenuius, lateri- 

 bus angulatis et irregulariter productis (basi usque ad 0.8 

 mm latum), vertice late denudato, margine ostiolari haud 

 prominente, ostiolo modice dilatato, saepe leviter foveolato. 

 Sporae ellipsoideae aut oblongae, long. O.oie — O.024, crass. 

 O.007 — O.011 mm (sec. annot. Nyl. „long. O.021 — O.025, crass. 

 O.on—0.014 mm"). 



Distr. In latere rupis dolomiticae in monte Valkea- 

 maki in Karelia Onegensi leg. J. P. Norrlin („Verrucaria 

 cataleptoides" sec. Nyl. in herb, suo, n. 2863, et in mus. 

 Fenn.). Conf. infra. 



Inter V. viridulam (Schrad.) et V. subviridulam Nyl. est in- 

 termedia, apotheciis ad priorem accedens et thallo V. subnigranti 

 et V. subviridulae subsimilis, sed hypothallo indistincto. - Thallus 

 plectenparenchymaticus, leptodermaticus, partim superne strato 

 corticali obductus, cavitatibus cellularum globosis, O.004 — O.006 mm 

 latis. Nucleus depresso-subglobosus, jodo partim caerulescens, 

 demum sordide violascens. Periphyses long. circ. O.025 mm, crass. 

 O.0015 mm, parce septatae, membrana extus gelatinosa. Paraphy-. 

 ses in gelatinam diffluxae, striis indicatae. Asci subclavati. 

 Sporae 8:nae, distichae aut tristichae, decolores, simplices, apici- 

 bus rotundatis. 



Obs. „Verrucaria cataleptoides" Nyl. in Norrl. Symb. Ladog. Kar. 

 (1878) p. 32, ad saxa dolomitica in Ruskeala in Karelia Ladogensi a 

 Norrl. lecta, ad V. Onegensem pertinet, sed specimen Nylandro a 

 Norrlino missum (n. 2864 in herb. Nyl.) ad var. Ruskedlensem Vain, 

 pertinet, ad V. viridulam accedentem, thallo minus verruculoso, oli- 

 vaceo-fuscescente, demum subtus nigricante, perithecio integro, len- 

 ticulari. latere angulato, sporis secund. annot. Nyl. „long. O.027 0.032, 

 crass. O.012 — O.014 mm". Forsan est autonoma species et tantum parce 

 lecta. 



19. V. nigrescens Leight. 



Brit. Ang. Lich. (1851) p. 62, tab. XXVII f. 1 (haud Pers.); Nyl 

 Exp. Pyrenoc. (1858) p. 23, Lich. Scand. (1861) p. 271, Fl. 1873 p. 203; 

 Th. Fr. Lich. Arct. (1861) |>. 267; Garov. et Gib. Tent. Lich. Longob. 

 (1865) p. 20, tab. I f. 8 (saltern p. p.); A. Smith Mon. Brit. Lich. (1911) 

 p. 286. Verrucaria umbrina .'<■ V nigrescens Ach. Lich. Univ. (1810) p. 



