1921. No. 7. STUDIES ON THE LICHEN FLORA OF NORWAY. 87 



12. Stereocaulon pileatum Ach. 



Akcrsh. Nesodden (Moe), Kristiania (M. N. Bl.), Åker: Ekeberg (Moe), 

 Maridalen (M.N. Bl.), Bjornsjoen (Moe), and Vettakollen (Moe); Hakedalen 

 (M. N. Bl.). Busk. Gyrihaugen (M. N. Bl.), Drammen: Bragernes (Somrft). 



Austagd. Lynger: Bergendal (B. L.). Rog. Rægefjord (H.). 



Hord. Trengereid-Samnanger (B. L.), Granvin: Eide (H.), Voss: Bryns- 

 bro (H.I. More. Rauma: Skiri (H.), Sundal: Nesja (H.). 



Troiiis. Tromso c. fr. (B. L.). 



Stereocaulon pilcafuiii is not so rare in Norway as it has been supposed. 

 Near Kristiania it has been recorded from several stations, and in Western 

 Norway it is 'not rare' (Havaas). But it is usually sterile and then easily 

 mistaken for PUopJiorus cereohis which is more common and more widely 

 distributed in Norway. 



7. Gyrophora Ach. 



/. Gyrophora leiocarpa (DC.). 

 Map XI, 2. 



Busk. Kongsberg: Jonsknuten (Poulss.), Haugastol: FoUaskaret (B. L.l. 



Austagd. Meien (B. L.). 



Hord. Granvin: Nesheimshorgen (H.l, Haarteignuten, summit (H.I, 

 Voss: Graasiden (M. N. Bl.I, Torfinnsdalen (Lid), and Lenehorgje (B. L.l, 

 Finse (Nordh.). Sogn. Filefjell (Moe), Dyrhaugstinderne (WulfsbergI, 

 Nordfjord: Olden (Mvrin). More. Romsdalen (H.). 



Hcd. Tron (B.L.I. Opl. Vaage: Sve (Norm.I, Lom: Lomseggen (Moe), 

 Lauvho (Zett.I, Harbakho (Th. Fr.), Gjeiteryggen (Zett.), Gjendin (Jebe), 

 Bitihorn (M. N. Bl.); Haalangenfjell (Linds.). 



Sortr. Dovre (Boeck), Hogsnydda (Th. Fr.), Kongsvoll (BoeckI, Vaar- 

 stien (KindtI, Drivstuen (Boeck). Nordtr. Stjordalsfjellene (M. N. BL), 

 Meraker: Storljellet (leg. ?). 



Nord I. Solvaagtind (Un ander). Troms. Sorreisa: Ostgaard (Norm.I, 

 Istinderne (Norm.I, Altevand: Lidfjell (Norm.I, Skibotndalen (B. L.l. Fiiuu. 

 Pasvik: Elvenes (Th. Fr. I, Jakobselven (Norm.). 



Gyrophora leiocarpa is a frequent species on the high mountains of 

 Southern Norway. It hardly ever descends to the tree line, only in 

 Western Norway it occasionally descends to 500 m. s. m. It ascends 

 to very high elevations, at least to 1900—2000 m. — It is not common 

 in Northern Norway. 



It prefers exposed places, large prominent stones, rocks, and pre- 

 cipices. 



