60 E. A. Voinio, Pyrenocarpeae. 



Obs. V. maura f. subopaca Brenner, Bidr. Hogl. Latv. (1885) 

 p. 126, ad Kappelniemi Hoglandiae lecta, sine descriptione indicata est. 



22. V. aractina Wahlenb. 



in Ach. Meth. Lien. Suppl. (1803) p. 17, Lich. Univ. (1810) p. 292; 

 Wahlenb. Fl. Lapp. (1812) p. 466; Nyl. Lich. Scand. (1861) p. 273. 

 Pgrenula aractina Ach. Syn. Lich. (1814) p. 121; Vain. Lich. Exp. 

 Vegae Pitlek. (1909) p. 160. Verrucaria maura ,!. aractina Th. Fr. 

 Lich. Arct. (1860) p. 268. V. maura i; V. aractina Nyl. Lich. Lapp. Or. 

 (1866) p. 170. 



Exs. Fellm. Lich. Arct. (1864) n. 215, 216 (non vidi). 



Thallus tenuis, continuus aut partim subdispersus, haud 

 aut parum rimulosus, minutissime creberrimeque verruculoso- 

 inaequalis scabridusque, nigricans, opacus, subtus et partim 

 intus nigricans et hypothallo confusus. Apothecia sat crebra 

 aut dispersa, verrucas formantia 0.4- 0.3 mm latas, sub- 

 hemisphaericas aut truncato-conoideas, lateribus sat ab- 

 ruptis obliquisve, amphithecio thallino nullo aut parum 

 distincto, vertice demum distincte impresso aut in non- 

 nullis apotheciis convexo permanente. Perithecium hemi- 

 sphaericum, fuligineum, integrum, lateribus productis, mar- 

 gine ostiolari vulgo demum impresso. Sporae „ellipsoideae 

 oblongaeve, long. O.ou— 0.oi<" (sec. Nyl.), crass. O.oos — 

 0.009 mm. 



Distr. In rupibus et saxis ad oram Maris Glacialis (fre- 

 quenter sec. Wahlenb.). Ad Olenji in Lapponia Murmanica 

 (P. A. Karsten, sec. specim. in mus. Fenn.), ad Panfelofka 

 in Lapponia Ponojensi (sec. Nyl. 1. c). 



Verrucae tlialli tantum lente forti observantur (lat. O.045— 

 O.050 mm). Gonidia pleurococcoidea, globosa, vulgo simplicia, 

 diam. O.007- — O.oos mm, membrana modice incrassata. Perithecium 

 fusco-fuligineum, superne crassum, basi tenuiore, rotundato. 

 Periphyses long. circ. O.022 — O.024, crass. O.001 mm. Paraphyses 

 in gelatinam diffluxae. Asci ventricoso-clavati, basi angustata, 

 membrana gelatinosa, modice incrassata. Sporae (in specim. orig. 

 Wahlenbergiano, quod hie describitur) long. O.012 — O.ou mm., 

 ellipsoideae, apicibus rotundatis, 8:nae, distichae, simplices, deco- 

 lores. Nucleus rotundatus, jodo glaucescens aut basi dilute cae- 

 rulescens, dein lutescens. 



