367 



v 



bus conglomeratis conglutinatisque contextarum circa Mortensnaes et Naesse- 

 by Finm. orient; in lapidibus arenariis ins. Spitsb. (Nordenskj.) 



Bene distincta species, sed thalli crassitie admodum varians; quum acrusta- 

 cea occurrit, non nisi microscopii usu a Verrucaria rupestri distingui potest Crusta 

 subdeterminata, saepe sordida. Apothecia mine hemisphaerica, iiunc truncato-co- 

 nica et interdum centre papillata; perithecium globosum, extus nigricans; nucleus 

 gelatinosus, roseolus. Asci saccato-clavati; sporae octonae, ellipsoideae, luteo- 

 lae, 0,u23 30 mm. longae et 0,oi5 17 mm. latae, blastidiis paucis, irregulariter 

 dispositis, varie angulosis. 



81. Verrucaria Pers. emend. 



Thallus crustaceus, uniformis; apothecia subglobosa, thallo iinmersa 

 1. plus minus libera, amphithecio nigricante, majorem nu'noremve apothecii 

 superioris partem tegente, perithecio extus plus minus obscure colorato; 

 paraphyses indistinctae, in gelatinam diffluentes; sporae simplices, ellipsoi- 

 deae 1. oblongae, incoloratae. 



1. V. nigrescens Pers.: crusta subgelatinoso-tartarea, rimuloso-areolata, 

 fusco-nigricante, hypothallo concolori confuso; apotheciis immersis, subglo- 

 bosis, ostiolo subpapillato protuberantibus, amphithecio subdistincto nigri- 

 cante, perithecio nigro. 



Syn. Verrucaria nigrescens Pers. in Ust. Ann. VII p. 155 et XIV 

 p. 36, Ach. Syn. p. 126, Smrft. Suppl. p. 138. Pyrenula Schaer. 

 Eniim. p. 210. Lithoicea Mass. Mem. p. 142. 



Verrucaria umbrina f. nigrescens Ach. Univ. p. 291. 

 Sagedia viridula F r. L. E. p. 414 (p. max. part). 

 Lithoicea controversa Mass. Mem. p. 142. 

 Verrucaria fusco-atra Koerb. Syst. p. 341. 

 Exs. Schaer. n. 439. 



In rupibus calcareis Nordlandiae passim (Smrft); in saxis recentioris 

 formationis F'inm. orient, parcius (Mortensnaes, Nyborg: ipse). 



Asci subclavati I. medio inflati; sporae octonae, ovoideae I. oblongae, intus 

 granuloso-griimosae, luteolae, 0,oi7 22 mm. longae et 0,ou7 9 mm. latae. 

 Specimina Finmarkica variis rationibus a forma primaria recedunt. 



2. V. striatula Wnbg. : crusta limitata, virescenti-atra , ex areolis 1. 

 verrucis ambitu dendritice effiguratis radiantibusque contexta, hypothallo ni- 

 gro; amphitheciis crassis, hemisphaericis, circa ostiolum distincte depresses, 

 peritheciis tenuibus, globosis, extus leviter nigricantibus. 



