Acta Socieatis pro Fauna et Flora Fennica 49, N:o 2. 27 



Stirps 1. Melanothecium Vain. Perithecium fuligi- 

 neum, subintegrum aut basi tenuius vel anguste inter- 

 ruptnm. 



Ser. A. Perithecium lateribus hand angulato-productis. 



1. V. aethiobola Wahlenb. 



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

 (excl. var.), Syn. Lich. (1814) p. 125. Lichen umbrinus Ach. Lich. Suec. 

 Prodr. (1798) p. 14 (p. p., sec. herb. Ach.), excl. syn. 



Thallus tenuis aut modice incrassatus, vulgo continuus 

 vel rimoso-diffractus, laevigatus, griseo-fuscescens vel fusco- 

 nigricans aut raro cinerascens vel ferruginoso-rut'escens, 

 opacus aut leviter nitidus. Apothecia sat crebra, verrucas 

 formantia subhemisphaericas, vulgo O.25— 0.5 mm latas, basin 

 versus plus minusve late amphithecio thallino, thallo conco- 

 lore obductas, vertice denudatas nigricantesque, sat opacas, 

 lateribus sensim dilatatis. Perithecium fusco-fuligineum, 

 basi tenue, depresso-subglobosum aut subglobosum, lateri- 

 bus rotundatis, ostiolo minuto minutissimove, margine ostio- 

 lari saepe leviter prominente tenuique. Sporae oblongae 

 aut ellipsoideae aut raro subovoideae, long. O.012— O.032, crass. 

 O.005 — O.016 mm. 



Var. primaria Vain. 



Verrucaria margacea var. aethiobola Nyl. Lich. Scand. (1861) p 

 272, Lich. Lapp. Or. (1866) p. 169; Norrl. Fl. Kar. Oneg. II (1876) p 

 39. V. aethiobola Nyl. Fl. 1877 p. 462, in Hue Addend. II (1888) p. 281 

 Lich. Paris (1896) p. 119; Arn. Lich. Frank. Jur. (Fl. 1885) p. 253 

 A. Smith Mon. Brit. Lich. II (1911) p. 282; Jatta Fl. It. Crypt. Lich 

 p. 810. 



Exs. Fellm. Lich. Arct. (1864) n. 215 (sec. Nyl.), 216 (mus. Fenn.) 

 — Malme Lich. Suec. Exs. VII (1910) n. 175. 



Thallus tenuis, continuus aut parum rimulosus, fu- 

 scescens aut fusco-nigricans aut subolivaceo-fuscescens, 

 hypothallo parum evoluto. Perithecium lat. O.25— O.30 

 (—O.35) mm, vertice demum late denudato nigricanteque. 

 Sporae long. O.012— O.024 (O.028— O.032), crass. O.007— O.012 

 ( — O.015) mm. 



