I92I. No. 7- STUDIES ON THE LICHEN FLORA OF NORWAY. 1 89 



7. Cetraria diffusa (Web.). 

 Syn. Cetraria alniritcs Ach. (Th. Fr.). 



Akcrsh. Holand (B. L.), Aker: Ljan (B. L.), Grorud (B. L.), Grefsen- 

 aasen (B. L.l, and \'oksenkollen (H.l, Baerum: Kolsaas (B. L.), Asker: 

 Nesoen (H.l. Trs//. Larvik (Norm.). Bitsk. Norderhov (B. L.), Hen (B. L.l, 

 Hol: Hegehaug (B. L.), and Odnak (B. L.l. 



Aiisfagd. L^ngor (B. L.l, Nergaren (B. L.). 



Hord. Sotteland (B. L.l, Kinsarvik (H.l, Granvin: Nestaasaasen (H.l, 

 \'oss (B. L.l, Mjoltjell (B. L.l. Sogn. Hafslo (H.l. .¥o;r. Romsdal: Skiri (H.l. 



Hcd. Matrand (B. L.l, Fæmunden: Sydenden (B. L.l, Hanestad: Grøtting- 

 bratten (B. L.), Helgoen: Hovindsholm (B. L.). Opl. Lillehammer: Mesna 

 (B. L.), Ringebu (Somrft.I, Vaagemo (B. L.l, \'elmunden (B. L.), Land: 

 Røberg (B. L.). 



Sortr. Fæmunden: Sorken (B. L.), Langen (B. L.), Trollheimen (Nordh.). 



Troms. Maalselven : Mestervik (B. L.l, Moen (B. L.), and Elvevoll (B. L.l, 

 Bardo: Stromsmo (B. L.l, \'ikran (B. L.l, Nordreisa: Sappen (B. L.l. Fiiiui. 

 Alten: Leirbotn (B. L.), Bosekop (B. L.l, and Rautasvarre (B. L.l; Porsanger: 

 Skoganvarre (B. L.l; Karasjok (B. L.l; Varanger: Fredheim (H.l, Elvenes (H.l, 

 and Jarfjord (H.). 



Only recorded from the stems of Piiiiis silvcstcr in our countr}-, never 

 on rocks. Evident!}' common in the Piims forests in all Norwav, perhaps 

 with the exception of Southern and Western maritime districts. It ascends 

 to the timber line. 



I have found the following reaction: Thallus KOH extus persistenter 

 intense flavescens, intus e flavo fulvescens vel etiam sanguineus. 



Apothecia are ver}^ rare in Norwa}'. 



8. Cetraria alvarensis (Wrg.). 



In our country this remarkable species has only been recorded from 

 the mountain plateau Hardangervidda in Hordaland: Graoberg (H. det. 

 Wain.) and Fagradalsvand (H. det. Wain.). 



I have only seen sterile specimens. Our specimens approach to Cetra- 

 ria jitniperiiia var. terrcstris Schaer. 



9. Cetraria cucullata (Bell.) Ach. 



Akersli. Aker several stations: Maridalen, Toien, Nakholmen, Hoved- 

 øen and Skoien (Moe, all st.). Ve^tf. Fredriksvern (JebeI. Busk. Gyrihau- 

 gen (H.l, Modum: Hovlandstjell (Moe), Hoi: Odnak (B. L.), Jonsknuten (KiærI, 

 Nore: Hallandsfjell (Kiær). 



Teleiii. Lifjell (Hoch), Gausta (M. N. Bl.). 



