PARMELIA. Circinaria. 



Obs. A Parmdia c&sia omnino distinda colore 

 8C scutelils sessilibus convexis. Margo accessorius 

 thallo concolor in junioribus tumitlus integer pe* 

 setatem obliteratur. Scutells periphericae minoies 

 8C juniores planiusculae margine tumente, centra- 

 les etiam sparsas sed hemisphaericse , margine vis^ 

 ullo vel tantum ad - basin conspicuo. Soredia nulla. 



77. Parm^ELXA casia; thallo crustaceo-membrana-- 

 ceo stellato albo-subcinerascente, subtus cine-i 

 reo nigro-fibrilloso, laciniis periphericis sub-« 

 linearibus inciso-crenatis ; scutellis planis cae-< 

 siis demum nigris , margine eievato tenui sub- 

 inflexo albo. 



Lichen casius Lich. Pr. p. 108- Hoffm. E- 



num. Lich. p. 65. Lich. p&ora Bick& 



, Lich. pulchellus Wulf. ap. Jacqu. GolL 



9. Lich. pulverulentus Westr. N. A£k 



Ac. Sc. Stockh. (excl. synon.) 



Xcon. Hoffm. Pl. Lich. T. 8. f, 1. En. L. T. 

 12. f. j. 



^Habitat in saxis & tfgnk, supra muscos ar~ 



borum truncos. 

 Ohs. Soredia herrusphaerica csesia in thallo sparsa* 

 Horurn prassentia, fibrillis nigris, seutellarum for- 

 ina earurnque margiue diverso praecipue a Barmz- 

 lia melatiaspide diifert. 



/3. P. dubia: fhallo crustaceo - mtmbranaceq> 

 stellato cinereo-caesio , subtus cineieo nigro- 

 fibrilloso, laciniis subimbricatis linearibuf 

 angustatis convexis lnuitifidis apice sxibtliiata* 

 tis margine dernum puiverulentis; scuteilisf 

 fusco-nigris,margine intearo subinfiexo albo. 



O ; O O 



Lichen dubius Lich. Pr. p. 103. JJchen 



diffusus? Koffm. Enum. Lich. p. 70 



Lobaria dubia Ejusci. FJ. Gcim. p. 156. 



Habitat in saxis Sc teclor um tc-guiis. 



Qbs. 



