26 BERNT LYNGE. M.-N. Kl. 



the case with morphological characters, e. g. the branching of the laciniae 

 which is of great importance for the whole habitus. Acharius himself is 

 of opinion that his f. rosulata is a »status adultus et senilis«. ^ 



var. radinta (Ach.) Nyl 



ParmeUa stellaris ci radiala Acharius Lieh. Univ. (1810) p, 477. 



Physcia stellaris a adprcssa a. gcjuiiiia ß. radiata Th. Fries Lieh. 

 Scand. I (1871) p. 139. 



Physcia stellaris f. radiata Nylander Lieh. Scand. (1861) p. iii. 

 Harmand Lieh. France (1909) p, 618. 



Tab. Ill fig. 5. 



var. stellata is a variety with narrow, stellate, from the centre to the 

 circumference discrete and continuous laciniae. Apothecia with pruinose 

 disc and entire margin. 



var. rosulata (Ach.) Nyl. 



Pannelia stellaris ß. rosulata Acharius Lieh. Univ. (1810) p. 477 



Physcia stellaris a. adpressa a. genuina ß. rosulata Th. Fries Lieh. 

 Scand I (1871) p. 139 



Physcia stellaris f. rosulata Nylander Lieh. Scand. (1861) p. ni. 

 Harmand Lieh. France (1909) p 6i8. 



Tab. Ill fig. 4. 



var. rosulata is a coarser variety, with broader, rugose laciniae, which 

 are contiguous at the centre and discrete only at the circumference. 

 Apothecia with black, epruinose disc and ere n ate margin. 



Intermediate varieties are frequent, especially one with the habitus of 

 var. radiata and entire margin and epruinose disc. The saxicolous speci- 

 mens belong here. However, we not rarel}' find the inverse proportion: 

 pruinose disc and crenate margin. — f. corallina Norm, in herb, is p. p. 

 Ph. aipolia, p. p. a coarse Ph. stellaris var. rosulata with microphylline, 

 very bullate central laciniae. — In the island Tromsoen I have found a 

 Ph. stellaris with very crenate laciniae, and coarsely crenate apothecia 

 with brown epruinose disc. 



1 Lieh. Univ. p. 477. 



