84 BERNT LYNGE. M -N. Kl. 



Physcia tremnlicola is separated from Ph. sciastrella Nyl. by its linear, 

 very narrow laciniae, appressed to the substratum, at least at the circum- 

 ference of the thallus. 



There is a difference in colour between the plants from Dovre and 

 Vaage on the one hand, and those from Hakedalen on the other. The 

 former ones agree entirely with the authentic specimen of Nylander, and 

 with NoRRL. and Nyl. Herb. Lieh. Fenn. 217, the latter are black. We 

 may describe them as follows: 



f t y pica. 



Thallus o 1 i vac eo-fuscus, subtus concolor. 



Recorded from Dovre (Zetterstedt, the authentic specimen of Ny' 

 LANDER, hb. mus. bot. Upsal.), \'aage: Presteberget (Havaas). 

 Ex sic. NoRRL. et Nyl. Herb. Lieh Fenn. No. 217. 



f atra n. f 



Thallus ater, subtus concolor. 



Known from Hakedalen, near Kristiania, on old Populns tiriutila. 



Exsic. Havaas Lieh. Norv. (inedited). 



There is no other difference between the two forms, which perhaps 

 only represent individual variation, or difterence of age. 



14. Physcia endococcina (Kbr.) Th. Fr. 



Pannelia eiidococci)ia Koerber Parerga (1865) p. 36. 



Physcia endococcina Th. Fries NVa Skandin. Lafarter. Bot. Not. 

 (1866) p. 150. Glück Morphol. der Flechtenspermog. Verb. Naturh. Mediz. 

 Vereins zu Heidelberg vol. VI N. F. (1899) p. 147 (67) fig. 39, Tab. II, 

 fig. I. 



Physcia obsciira var. endococcina Th. Fries Lieh. Scand. I (187 1) 

 p. 143. Nylander De gonidiis etc. Flora (1877), p. 354. Leighton Lichen- 

 Flora (1879) p. 142. Havaas Floristiske undersøgelser. Berg. Mus. Aarb. 

 (1897), no. III, p. 10. Dalla Torre et Sarntheim Die Flechten von Tirol 



