1 92 1. No. 7. STUDIES OX THE LICHEN FLORA OF NORWAY. 203 



11. Cetraria fahliinensis (L.) Wain. 



Akcrsh. Holand: Skullerud (B. L.), Drobak (B. L.), Aker: Hauktjern 

 (B. L.), and Kikut (B. L.K Vestf. Tonsberg (B. L.), Yasser (B. L.). Busk. 

 Gyrihaugen (B. L.I, Jondalen (Kiær), Jonsknuten (Kiær), Hallandstjell (Ki.f.rI. 



TelcDi. Gausta (Th. Fr.). Austagd. L^ngor (B. L.), B3klum (B. L.I. 



Hard. Siggen (H.), Strandebarm: Vesold (Lillef.), Granvin (H.), Finse 

 IB. L.), Haarteignuten summit (H.I. Sogii. Stat: Svartehorn (H.|, and Tar- 

 \alseggen (H.I. 



Hed. Solor: Haslemo (B. L.), Tron (B. L.I. Opl. Nævertjell (Jebe), 

 Rondane (Zett.I, Gjeiteryggen (Th. Fr.I. 



Soiir. KongsvoU (Th. Fr.I. Nordtr. P'ongen, Fongtjell (M. N. Bl.I. 



Nordl. Bode (Zett.), Saiten (Somrft.I, Hadseloen (Norm.). Troiiis. 

 Senjen: Gibostad (B. L.), and Svartfjell (B. L.|; Maalselven: Mestervik(B. L.I, 

 and Moen (B.L.I, Bardo: Innset (B. L.), and Altevand (B. L.I; Vikran (B. L.I, 

 Ramt"iorden (B. L.I, Tromso common (Th. Fr., Norm. I, Mikkelvik (B. L.I; 

 Lyngen: Havnes (Norm.I, Lyngseidet (B. L.I, and Helligskogen (B. L.). Fiiuii. 

 Alten: Lille Lærrisfjord (B. L.I, Bosekop (Zett.), Skoddavarre (B. L.I, and 

 Store Raipas (B. L.I; Hammerfest (Th. Fr.); Porsanger: Osterbotn (B. L.l; 

 Tana: Mehavn (H.), and Fjelbma (Th. Fr.); Varanger: Vadso (H.l, Nyborg 

 (Th. Fr.), Langfjordbotn (Th. Fr.I, and Jarfjorden (Th. Fr.). 



From the level of the sea to far above the tree line, common at sub- 

 alpine and alpine stations and in the whole of Northern Norwa}', not rare 

 in the eastern and central lowlands, but never recorded from the lowlands 

 on the western coast. — By far less common than C. hepatizon. 



Usually smaller than the latter species (3 — 5 cm. I, but it can obtain a 

 considerable size, up to 14 cm. In most cases readily recognized by the pale 

 brownish lower side — C. hepatizon is black — but this colour varies, and 

 on the other side C. hepatizon has a narrow pale marginal zone which 

 sometimes spreads over the adjacent parts of the lower side. In case of 

 doubt quite incontestable determinations are therefore only obtained by an 

 investigation of the pNxnoconidia. — Pycnides are very common, though 

 not found in all specimens. 



The laciniae are less appressed than in C. hepatizon, the}- have a certain 

 tendency to form panniform thalli, f. panniformis Nyl. in Norrl. et Nyl. 

 llerh. Lieh. Finn. No. 113. — The breadth of the laciniae varies, occasion- 

 allv the are profoundly incise and very narrow, f. teimisecta Th. Fr. Lieh. 

 Scand. p. 109. These formae occur with the type though not so frequently. 

 I can onlv consider them to represent indi\idual variation, not well limited 

 systematic units; there is every transitional stage, and there is a parallel 

 variation in the related species C. hepatizon. 



Apart of the morphological marks of distinction between this species 

 and C. hepatizon, we may mention the following carpological ones : The 



