42 BERNT LYNGE. M.-N. Kl. 



Physcia stellaris $ adscendens d marina TH. FRIES. Lich. Scand. i 

 (1871) p. 140. 



Physcia leptalea var. subobscura OLIVIER Lichens d'Europe I (1907) 

 p. 240 (164). 



NYLANDER was well aware that this plant was named by EDW. NYLAN- 

 DER, but he rejected the older name on the insufficient grounds that it 

 was non bonum: Dicta var. marina I.e. sed hoc nomen non bonum, 

 quia etiam aliae formae in maritimis occurrunt 1 . 



E. FRIES mentions a maritime form which is probably our species, 

 but I have not seen his plants: vidi rarissime v. c. e. Christiania in Nor- 

 vegiae maritimis lectae cinereo-fuscescentem 2 . 



TH. FRIES cites as a synonym Borrera tenella $ leptalea ACH. Lich. 

 Univ. p. 498 3 , the variety of Acharius perhaps includes our species, but 

 it is not identical, which is seen from his description as well as from the 

 station: Habitat in saxis et truncis arborum Europae. 



Exsic. STENHAMMAR Lich. Suec. 212 inf. dext. 



Thallus loosely fixed to the substratum, pulvinate, 

 laciniae at the circumference free from the substratum, but not ascendant 

 or only slightly so, towards the centre more or less ascendant or even 

 erect, subimbricate, repeatedly very multifid with divaricate, divergent 

 interlaced branches. Laciniae elongate, narrow (0,2 0,5 mm. broad), con- 

 vex, slightly rugulose, opaque, not isidiate, along the margin instruc- 

 ted with long, spreading unbranched dark cilia. Thedilated, 

 frequently incurved, never fo rnicate, api ces of the laciniae 

 sorediate at their lower side. Colour ash-grey, varying from 

 pale grey to very dark, almost black, lower side pale grey or uncoloured, 

 with few rhizinae. 



Hyphae of the upper cortex more thick-walled than in Ph. tenella. 

 Apothecia and pycnides frequent; disc black. 



Otherwise the anatomical, carpological and chemical characters as in 

 Ph. tenella. 



Hab. Confined to maritime rocks, growing along cracks or in low 

 moist grooves, frequently sprinkled by the sea-water; the P/acodiuw-beh 



of WARMING 4 . 



1 NYLANDER Ad vegetationem etc. 1. c. 



53 E. FRIES Lich. Etir. reform, p. 83. 



3 TH. FR. Lich. Arct. p. 65. 



4 Dansk Plantevaekst I Strandvegetalionen p. 8. 



