5o 6 ( lUrhardson's Flora der Polar-Länder. ) 



lacinias tubulosas reddant; exsiccatione iteram evolvnntur. 

 Apolhecia in margine thalli sparsa , in initio concava mar- 

 line inflexo, mox ampla, subpedicellata, flexuosa, margine- 

 que irregulariter reflexo ; snpra lamina proligera üavescenti- 

 brunnea nitida, margine thallode earn non excedente sub- 

 cincta , subtas e pagina tballi superior! formata. Ambitus 

 apotheciorum granulatus, repandus aut etiam fissus, semper 

 valde irregularis et modo Cetrariarum subliberus. Thallus 

 in sicco fragilis vix tarnen rigidus , madefactus pallet totus 

 et eius apices interdum olivaceo-virides fiunt. Sunt quo- 

 que specimina , quorum apices colorem viridem etiam in 

 s;cco conservant. In nuda terra late pulvinatim expansus 

 est, sed nulla radice bumo affixus. Rarius fructificat. 



Hab. In den Barren - Grounds 3 meist in Rennthier- 

 Spuren. Südlicb vom Grossen Sklaven-See kam sie nicbt vor. 



609. Peltidea sculata : Ach. Syn. p. 257. Engl. 

 Bot. t. 1854. *&Ai Catal (W.) 



G10. P. aphthosa: iftüi; p.*o38. Milhl. Cat. (W.B.) 

 (762)54 611. Nephroma polaris : ibid. p. 241. (W.B.) 



612. N. resupinata : ibid. p. 241. (W.) 



6i5. EverniaPrunastri : ibid. p. 245. Engl. Bot. 

 I 8,09. MÜhl Cat. (W.) 



614^ Dufourea arctica : ihallo sulphureo-flavo ni- 

 lido flstuloso , apotheciis hepatico-brunneis : D. ru- 

 gosa : Brown, Ross's Voyage? (042.) (ß.) 



E thallo vetusto fistuloso prostrato surculi subulato- 

 ventricosi exsurgunt , saepe caespitosim sese inter muscos 

 erigentes : tliallo primordiali destructo, hi surculi tballos 

 erectos fere palmares sulpliureo- flavos , ad basin flavescenti- 

 brunneos , saepissime simplJciusculos efficiant, nunc tarnen 

 rairum unum vel alternm edunt aut furcati extant, inter- 

 dum, nee non apieibus casu excisis , ramnli exereseunt po- 

 detia Cenomjcium quarundam simulantes. Thallus membra- 



