92 BERNT LYNGE. M.-N. Kl. 



Physcia caesitia Nyl. is recorded to have been found in Northern 

 Finland, not far from our frontier ^ I have never seen it from Norwegian 

 stations. 



f cidscendens n. f 



Apices laciniarum adscen dentes vel etiam erec tae; laciniae 

 inibricatae, convexae, multifidae, pinnatae vel profunde crenato-incisae, apice 

 vulgo flabelliformiter dilatatae, rugosae ; laciniae secundariae numerosae, 

 parvae, papillaeformes. Praeterea ut in specie, 



Loc. Central Norway: Finse (Sandalshegen) 1450 m. s. m. (Ly.n'ge). 



This form is not very significant, probably only a luxuriant individual 

 variation. On the other hand the closely appressed laciniae are very 

 characteristic of Ph. cacsia, and this variation (or form) deserves a name. 



f. alpina n. f. 



Differt a specie sorediis isidiifo rmi bu s , papillatis, depresso- 

 giobosis vel subplanis, limitatis, pro parte corticatis, obscuratis vel 

 thallo concoloribus. 



Praeterea ut in specie. 



Hab. On schistose and calcareous rocks, in Southern Norway in 

 alpine situations, in Northern Norway at all elevations; frequently associated 

 with Pliyscia tribacia. 



Loc. Central mountains: Gjeilo and Finse (Lynge), Northern Nor- 

 way : Rolla in Ibbestad, Gibostad in Senjen, Norbynesset in Malangen' 

 Skoelvdalen in Maalselven, and Tromsøen (Lynge). 



This is a rather characteristic variety, due to the peculiar development 

 of the soredia, representing an intermediate state between soredia and 

 isidia. Occasionally the soredia are poorly developed, in other specimens 

 they are almost confluent. — It is impossible to attribute the form of the 

 soredia to climatic influence, for the thallus is otherwise well developed, 

 and it frequently grows associated with the type. — The colour of the 

 thallus and the development of the laciniae vary as in the typical Ph. caesia. 



1 NoRRLiN, J. P. Berättelse i anledning af en till Torneå Lappmark verkställd naturalhistorisk 

 resa. Not. Sällsk. Fauna och Flora Fennica förh. vol. XIII, 1873, p. 326. 



