324 E. A. Vainio, Lecideales. 



Thallus areolis convexis, verrucaeformibus, supra hypothallum 

 nigrum dispersis, albidis aut p. p. etiam flavescentibus in eodem 

 specimine. 



Distr. Supra rupem quartziticam in reg. subalp. mentis Pyha- 

 tunturi in Sodankyla in LKem. (Vain.). 



Thallus KHO baud distincte reagens, medulla jodo non caeru- 

 lescens. Perithecium rubricoso-fuligineum. Epithecium rubricoso-fuli- 

 gineum, KHO distinctius rubricosum. Sporae 1-septatae, long. O.024 — O.026, 

 crass. 0.009—0.013 mm, medio constrictae. 



F. gerontoides (Nyl.) Vain. Lecidea alpicola f. gerontoides Nyl. 

 in Norrl. Ber. Torn. Lappm. (1873) p. 341. Rh. chionophilum f. geron- 

 toides Th. Fr. Lich. Scand. II p. 612. 



Thallus areolis planis, supra hypothallum nigrum dispersis, 

 albidis. 



Distr. Ad saxa dioritica in Lompolotunturi in Kittila in LKem. 

 (Norrl). Specimen thallo flavo instructum, in monte Nuorunen in 

 Kuus. collectum, p. p. in banc formam transit, etiam areolas albas 

 habens. 



Hue etiam Malme Lich. Suec. Exs. n. 348 p. min. p. pertinet. — 

 Diversa est Lecidea gerontoides Stirt. For. Lich. p. 165. 



28. Rh. Rittokense (Hellb.) Th. Fr. 



Lich. Scand. II (1874) p. 615. Buellia Rittokensis Hellb. Lich. Ant. 

 Lule Lappm. (Ofv. K. Vet.-Ak. Forh. 1865) p. 463. Lecidea Nyl. H. L. F. 

 n. 345; Vain. Adj. Lich. Lapp. II (1883) p. 130, Lich. Exp. Vegae Pitle- 

 kai (1909) p. 116. Catocorpon Rittokense Hellb. Norrl. Lafv. (K. Sv. Vet.- 

 Ak. Handl. B. 20 N. 8, 1884) p. 106. 



Exs. Norrl. et Nyl. Herb. Lich. Fenn. VII (1882) n. 345. 



Thallus areolis squamaeformibus, vulgo rotundatis an- 

 gulosisve, sat parvis, planis aut vulgo concavis, castaneo- 

 fuscis aut fusco-badiis rufescentibusve, nitidis, inargine toto 

 adscendente elevatoque, cinerascente aut raro nigricante, 

 opaco, subtus obscuratis, supra hypothallum nigrum di- 

 spersis aut rarius p. p. contiguis, basi vulgo bene con- 

 strictis, intus albis, KHO non reagentibus, jodo vulgo cae- 

 rulescentibus. Apothecia vulgo mediocria, nigra, nuda, disco 

 piano aut demum depresso-convexo, baud papillato, margine 

 sat tenui, subpersistente. Sporae 8:nae, primum decoloratae, 

 demum aeruginoso-nigricantes, long. circ. 0,021 O.024 mm 



