300 E. A. Vainio, Lecideales. 



Thallus sat crassus, areolatus, areolis depresso-convexis aut 

 planis, contiguis, cinereis. Apothecia nigra, nuda, margine modice 

 incrassato. Hymenium praesertim parte superiore partim aerugino- 

 sum, epithecio vulgo subolivaceo. 



Distr. Supra rupes et saxa, gneissacea et granitica, in campis 

 graminosis et aliis locis apertis et in littoribus rivulorum lacuumque, 

 raro in latere rupis loco umbroso. N.: Punavuoret Helsingforsiae 

 (a. 1874 legi, „L. amphibia" sec. determ. Nyl.). Ta. : Onkisalo in Lu- 

 hanka („L. amphibia forma atypica" in Vain. Fl. Tav. Or. p. 117). 

 Tb.: Norola in par. Jyvaskyla (Vain., 9872 in herb. Nyl.). Kb.: Niska 

 in Enontaipale (Vain.). KOn.: Pyhaniemi („L. amphibia" sec. determ. 

 Nyl. in Norrl. Fl. Kar. Oneg. II p. 35). OKaj.: Tervasalmi in Kuhmo, 

 Pietari et Kiannanniemi in Kianta („v. amphibia" in Vain. Adj. Lich. 

 Lapp. II p. 139). 



Rh. amphibiam (Fr.) in memoriam revocans et cum eo commixta, 

 apotheciis demum prominentibus adnatisque, nee aspicilioideis nee im- 

 mersis, et thallo distinctius areolato, nee subcontinuo ab eo differens. 

 Thallus areolis laevigatis, KHO non reagens. Apothecia sat crebra 

 aut partim sublineato- vel irregulariter aggregata, lat. O.s — 1.3 mm, 

 demum prominentia adnatave, disco vulgo papillato. Perithecium rub- 

 ricoso- aut in margine cyanescenti-t'uligineum. Hypothecium fuscescens 

 aut fulvo-fuscescens aut rubricosum. Hymenium circ. 0.i4o— O.150 mm 

 crassum. Sporae decoloratae aut demum aeruginosae, long. circ. O.024 — 

 0.034 mm ( — 0.040 mm sec. annot. Nyl.), crass. O.oio — O.oie mm, demum 

 vulgo murali-divisae aut submurales. 



F. xylogena Th. Fr. Lich. Scand. II (1874) p. 629. 



Thallus modice incrassatus, verrucosus, verrucis circ. O.25 (O.2 — O.3) 

 mm latis, convexis aut depresso-convexis, contiguis aut confluentibus, 

 subolivaceo- aut subfuscescenti-cinereis. Apothecia nigra, margine 

 modice incrassato. 



Distr. Ad conductum ligneum molendinae in Kurkoja in Korpi- 

 lahti in Ta. (Vain. Fl. Tav. Or. p. 117). 



Perithecium et hypothecium rubricoso-fuligineum. Hymenium 

 dilute aeruginosum, epithecio subviolascente. Sporae 8:nae, decoloratae, 

 long. 0.026 — 0.031, crass. O.013 — O.oie mm, septis transv. 3 — 5, loculis 2— 

 pluribus septo uno aut septis duobus longitudinalibus obliquisve 

 divisis. 



Obs. 1. Rh. confervoides D.C. sec. Nyl. in Hue Addend. II (1888) 

 p. 218 pertinet ad L. lavatam Nyl. (Rh. obscuratum Mass.). Sec. Nyl. 

 Lich. Scand. p. 233 et Lamy Cat. Lich. Mont-Dore (1880) p. 132 spectat 

 ad statum hypothallo fimbriato-radiante instructum. Ex herb. D.C. 

 „compositum est e veri Rhizocarpi (h. e. Eurhizocarpi) et Lecideae 

 speciebus", ut indicat Th. Fr. in Lich. Scand. II p. 618. 



