I9l6. No. 8. MONOGRAPH OF THE NORWEGIAN PHYSCIACEAE. 23 



4. Laciniae appressed. 



6. Ph. pulventlenta. 

 4 * Laciniae more or less ascending. 



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



7. Ph. muscigena. 

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



8. Ph. constipata. 

 2 * Thallus epruinose. 



3. Laciniae narrowly filiform. 



i}. Ph. tremuticola. 



3 * Laciniae narrow or broad, but never filiform. 

 4. Lower part of the medulla red. 



14. Ph. endococcina. 

 4 * Medulla uniformly uncoloured. 



5. Neither soredia nor isidia developed. 

 6. Corticolous. 



/o. Ph. obscitra. 

 6 * Saxicolous. 



12. Ph. lithotea. 



ff. mida 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. sciastrella. 

 7 * Lower side black. 



12. Ph. litothea. 



i. Physcia stellaris (L.) NYL. 



Lichen stellaris LINNE Spec, plant. (1753) p. 1144 pp.; HOFFM. Enum. 

 (1784) p. 71 et tab. XIII fig. i 2. 



Parmelia stellaris ACHARIUS Methodus (1803) p. 209; ACHARIUS Lich. 

 Univ. (1810) p. 476; KOERBER Systema (1855) p. 85 (sensu latiore). 



Physcia stellaris (L.) NYL. var. adpressa TH. FR. Lich. Scand. I (1871) 

 p. 138; LYXGE Busk og bladlaver (1910) p. 102. 



Physcia stellaris NYLANDER Prodromus (1857) p (307) (sensu latiore), 

 NYLANDER Synopsis (1860) p. 424 (sensu latiore), Nylander Lich. Scand. 

 (1861) p in (sensu latiore), DEICHMANN BRANTH og ROSTRUP Lichenes 

 Daniae (1869) p. 65, tab. Ill, fig. 13, MULLER u. PABST Flechten (1876) 

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

 Wainio Adjumenta I (1881) p. 134, CROMBIE Brit. Lich. I (1894) P- 3 10 - 

 HUE Lich. Extra-Eur. (1900) II, p. 58; OLIVIER Lich. d'Eur. I (1907) p. 239; 

 HARMAND Lich. France (1909) p. 617. 



