igiÖ. No. 8. MONOGRAPH OF THE NORWEGIAN PHYSCIACEAE. 23 



4. Laciniae appressed. 



6. Ph. ptilvertileuta. 

 4 * Laciniae more or less ascending. 



5. Laciniae coarse, chestnut-brown, very pruinose. 



7. Ph. imiscigetia. 

 5 * Laciniae thin, greyish-brown, ahiiost epruinose. 



A". Ph. consfipa/a. 

 2 * Thallus epruinose. 



3. Laciniae narrowly filitorni. 



rj. Ph. treinnticola. 



3 * Laciniae narrow or broad, but never filiform. 

 4. Lower part of the medulla red. 



14. Ph. emiococritia. 

 4 * Medulla uniformly uncoloured. 



5. .Neither soredia nor isidia developed. 

 6. Corticolous. 



10. Ph. obscura. 

 6 ■"' Saxicolous. 



12. Ph. lithotea. 



ff. Hilda and lithotodes. 

 5 * Thallus either with soredia or isidia. 

 6. No isidia, thallus sorediate. 



//. Ph. virella. 

 6 * No soredia, thallus isidiate. 

 7. Lower side uncoloured. 



//. Ph. scia $1 relia. 

 7 * Lower side black. 



/_'. Ph. litothea. 



I. Physcia stellaris (L ) Xyl. 



Lichen stellaris Linné Spec, plant. (1753) p. 1144 pp.: Hoffm. Enuni. 

 (1784) p. 71 et tab. XIII fig. 1 — 2. 



Pan)ielia stellans Acharius Methodiis (1803) p. 209; Acharil's Lieh. 

 L'niv. (1810) p. 476; Koerber Systema (1855) P- ^5 (sensu latiore^. 



Physcia stellaris (L.) Xyl. var. adpressa Th. Fr. Lieh. Scand. I (1871) 

 p. 138; Lynge Busk eg bladlaver (1910) p. 102. 



Physcia s.'ellaris Xylander Prodromus (1857I p (307) (sensu latiorel. 

 Xylander Synopsis (i860) p. 424 (sensu latiore), Xylander Lieh. Scand. 

 (i86i) p III (sensu latiore). Deichmann Branth eg Rostrup Liehenes 

 Daniae (1869) p. 65, tab. Ill, fig. 13, Müller u. Pabst Flechten (1876) 

 tab. V, (sensu latiore). Xylander Addenda nova Flora (1870I p. 38, 

 Wainio Adjumenta I (1881) p. 134. Crombie Brit. Lieh. I (1894) P- Si»- 

 Hle Lieh. Extra-Eur. (1900) II. p 58: Olivier Lieh. d'Eur. I (1907) p. 239; 

 Harmand Lieh. France (1909) p. 617. 



