Acta Societatis pro Fauna et Flora Fennica, 53, N:o 1. 223 



Var. detrita Vain. 



Thallus verrucosus verruculosusque, flavescens. 



Distr. Ad terrain subarenosam supra rupem prope Makela in 

 Judinsalo in Luhanka in Ta. et in Pihlajavesi in Tb. (Vain.). 



Intermedia est inter v. citrinellam et v. griseam, analoga et 

 habitu subsiinilis B. alpinae var. subecrustaceae Nyl., a qua epithecio 

 fuscofuligineo differt. Verrucae tliallinae lat. 0.7 — O.15 mm, aggregatae 

 contiguaeque aut dispersae, plus minus farinoso-sorediosae, convexae, 

 lateribus abruptis. Apothecia in acervulis verrucarum thalli sita. Epi- 

 thecium fuscot'uligineum, HNO3 aeruginosum, demum decoloratum. 

 Hypothecium superne albidum, inferne rubricoso-fuscescens, HNO3 

 rubricoso-rufescens et solutionem ejusdem coloris eftundens. Peri- 

 thecium laterale fuscofuligineum, in summa parte marginis HNO3 mox 

 aeruginosum et solutionem ejusdem coloris effundens, ceterum HNO3 

 rubricoso-rufescens. 



Var. grisea (Th. Fr.) Vain. Arthrorhaphis grisea Th. Fr. Lich. 

 Arct. (1860) p. 204. Rhaphiospora grisea Arn. Lich. Fragm. XI (1871) 

 p. 50. Lecidea citrinella forma macra arenicola Nyl. Prodr. Lich. Gall* 

 (1857) p. 390 (144). L. citrinella f. arenicola Nyl. in Norrl. Fl. Kar. 

 Oneg. II (1876) p. 36. Rhaphiospora arenicola Mudd Man. Brit. Lich. 

 (1861) p. 186. Secoliga flavovirescens f. arenicola Stizenb. Krit. Bem. 

 Lee. Nadelf. Sp. (1863) p. 13. Lecidea arenicola Leight. Lich. Great 

 Brit. (1871) p. 356. Rhaphiospora flavovirescens f. arenicola Arn. Lich. 

 Frank. Jur. (1884) p. 190. Bacidia flavovirescens var. arenicola A. L. 

 Sm. Mon. Brit. Lich. II (1911) p. 165. Lecidea citrinella var. ecrustacea 

 Nyl. in Norrl. Ber. Torn. Lappm. (1873) p. 341. 



Exs. (secund. Arn. I.e.). Leight. Lich. Brit. Exs. XII (1866) n. 372. 

 — Arn. Lich. Exs. (1864) n. 261 a, b. 



Thallus evanescens aut albidus tenuissimusque. 



Distr. Supra thallum Baeomycetis carnei Floerk. (KHO rubescen- 

 tem) aliorumque lichenum et supra terram arenosam nudam crescit. 

 Ta. : Asikkala (J. P. Norrlin). Tb.: Pihlajavesi (Vain.). KOn.: Suojarvi 

 (Norrl.). Kuus.: livaara (F. Silen). LEnont. : Prope Kaaresuanto 

 (Norrl.). 



Saepe in var. citrinellam (Ach.) transit, parce aut parcissime 

 etiam areolas citrinas minutissimas aut majores minoresve gonidiosas 

 procreans. Item in eodem specimine supra terram nudam et supra 

 thallum alienum apothecia hujus varietatis observantur, quare haec 

 planta non est vera parasita, at analoga formis ecrustaceis lichenum. 

 Apothecia parva, lat. O.e — O.is mm, crass, usque ad O.340 mm. Perithe- 

 cium quasi carbonaceum, ex hyphis formatum irregulariter contextis, 

 conglutinatis, cavitatibus oblongis aut brevioribus, O.0015 mm latis, irre- 

 gularibus, membranis modice incrassatis, fuligineum vel fusco-nigricans, 



