

Acta Societatis Pro Fauna et Flora Fennica, 49, N:o 2. 103 



Hepp Flecht. Eur. n. 447 crusta cinerascente inaequali instructa, cum 

 specimine ad Valkeamaki in Karelia Onegensi lecto satis congruit. 



6. P. nigrata (Nyl.) Lonnr. 



Descr. Lich. (Fl. 1858) p. 631. Verrucaria nigrata Nyl. Prodr. Lich. 

 Gall. (1857) p. 430 (184), Exp. Pyrenoc. (1858) p. 34, Enum. Lich. Fret. 

 Behr. (1888) p. 67; Vain. Adj. Lich. Lapp. II (1883) p. 168; Lamy Exp. 

 Lich. Cauter. (1884) p. 104. Verrucaria gelatinosa Nyl. Collect. Lich. 

 Gall. (Nya Bot. Not. 1853) p. 164 (nee Ach. Lich. Univ. p. 283, nee Nyl. 

 Exp. Pyrenoc. p. 21 sec. Nyl. Fl. 1881 p. 7). Polymastia gelatinosa Th. 

 Fr. Lich. Arct. (1860) p. 262, Lich. Spitsb. (1867) p. 49, Polybl. Scand. 

 (1877) p. 17; Norm. Spec. Loc. Nat. (1868) p. 369 (129). Polymastia 

 caliginosa Norm. 1. c. Verrucaria confusa Nyl. in Stizenb. Ind. Lich. 

 Hyperb. (1876) p. 54. 



Thallus modice incrassatus, verruculoso-inaequalis, sub- 

 dispersus diffractusve, fuscidulus nigricansve. Apothecia 

 sparsa, thallo semiimmersa, vertice convexo hemisphaericove, 

 nigro, denudato, margine ostiolari haud prominente, ostiolo 

 parvo, haud foveolato. Perithecium globosum, 0.3— 0.4 ( — O.54) 

 mm latum, fusco-nigrum (,,fuscescensve" sec. annot. Nyl.), 

 integrum. Sporae 8:nae, decolores, murales, cellulis nume- 

 rosissimis, long. 0.036 — O.060, crass. O.022 — O.030 mm („0.ois — 

 O.027 mm" sec. annot. Nyl.). 



Distr. Ad muscos destructos et terram calcariam supra 

 rupem prope Sirkela in Kuusamo (Vain.). 



Thallus opacus, sub microscopio superne fusco-nigricans, 

 strato corticali destitutus. Apothecia opaca. Perithecium ob- 

 scuratum, basi crassum. Periphyses numerosae, constipatae, 

 simplices aut parce ramosae, increbre septatae, long. circ. O.040, 

 crass. O.002 mm. Paraphyses obsoletae, striis parcissimis indica- 

 tae. Asci clavati aut ventricosi, long. circ. O.120, crass. 0.036 — 

 O.040 mm, membrana modice incrassata, molli. Nucleus albidus, 

 parce resinoso-guttulosus, jodo dilute subrubescens, basin versus 

 interdum primum dilute caerulescens. Sporae distichae, ellipsoi- 

 deae aut oblongae, apicibus rotundatis aut subobtusis, seriebus 

 cellularum transversis circ. 10, jodo non reagentes, membrana 

 tenui, haud gelatinosa. Gonidia pleurococcoidea, intense viridia, 

 simplicia aut septata glomerulosave, membrana sat tenui. 



Obs. Specimen orig. jam non integrum Verr. gelatinosae Ach., a 

 Nyl. descriptum, denuo non examinavi. Habitu sat simile est P. ni- 

 gratae, at secundum Nyl. sporis multo majoribus ab ea differt et sit 



