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. radiata (Acn.) NYL. 



Parmelia stellaris a radiata ACHARIUS Lich. Univ. (1810) p. 477. 



Physcia stellaris adpressa a. genuina ft. radiata TH. FRIES Lich. 

 Scand. I (1871) p. 139. 



Physcia stellaris f. radiata NVLANDER Lich. Scand. (1861) p. in. 

 HARMAND Lich. 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 (Acn.) NYL. 



Parmelia stellaris ft. rosulata ACHARIUS Lich. Univ. (1810) p. 477 



Physcia stellaris a. adpressa a. genuina ft. rosulata TH. FRIES Lich. 

 Scand. I (1871) p. 139. 



Physcia stellaris f. rosulata NYLANDER Lich. Scand. (1861) p. in. 

 HARMAND Lich. France (1909) p 618. 



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 crenate 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 rarely 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 Tromseen I have found a 

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

 with brown epruinose disc. 



Lich. Univ. p. 477. 



