I92I. No. 7- STUDIES OX THE LICHEN FLORA OF NORWAY. I93 



Xordl. Saltdalen (Somrft.), Sorfolla: Seljeaasen (Norm.), Lofoten IBarth), 

 Hadseløen (Norm.). Troms. Trondenes (Norm.), Finsnes (B. L.I, Gibostad 

 (B. L.), Maalselven: Moen (B.L.), ElvevoU (B. L.), Bjornstad IB. L.l, and 

 Likkavarre (B. L.l, Bardo: Innset (B.L.I, and Rokkomborre (B. L.); Ram- 

 fjorden (B. L.l, Tromsoen IB. L.), Lyngen: Lyngseidet (B. L.l, Skibotn (B. L.l, 

 and Helligskogen (B. L.l; Nordreisa: Sappen (B. L.l. Fi)iiu. Alten: Skodda- 

 varre (Norm.), Tverelvdalen (Norm.), Jesjok (Norm.), and Rautasvarre (B. L.); 

 Kautokeino (Norm.); Porsanger: Lakselv (Norm. I, and Rævfosnes (Norm.); 

 \'aranger: Fredheim (H.I, Elvenes (Th. Fr. I, and Boris Gleb \\\.\. 



Frequent in the forest zone in our whole country, less common on 

 the coast, and hardly recorded from the Finmark coast where the forest is 

 lacking. It ascends considerably higher than the tree line, but not to the 

 highest summits. 



On Bctiila, Sorbits, and other trees, wood-fences, also on rocks and 

 stones. 



Apothecia rarissinia, sat parva, diam. 3 — 7 mm., lobis bre\ibus, tenuibus 

 antice affixa, adscendentia. Discus concavus, castaneus, nitidus, epruinosus. 

 Margo crenatus, intense citrino-sorediatus. Receptaculum rugulosum, sore- 

 diatum. Cortex receptaculi incoloratus, o — 40 1 50 1 \j. crassus, hyphis 10 \j. 

 crassis, pachydermaticis, perpendicularibus, transverse septatis (non plecten- 

 chymaticis) formatus, lumina cellularia oblongo-rotundata. Cortex infra- 

 hypothecialis 25 — 40 \j. crassus, hvphis hymenio + perpendicularibus for- 

 matus, textura ut in cortice normali. Hyphae medulläres adspersae, laxe 

 contextae. Medulla fere tota gonidiis repleta, praecipue sub cortice infra- 

 hvpotheciali. H3-pothecium 20 — 25 a altum, hyphis angustis hymenio + 

 parallelibus formatum. Hvmenium angustum: 60 — 65 [jl, superne flavo- 

 fuscescens, ceterum incoloratum, strato amorpho incolorato tectum. Para- 

 physes sat validae, apice clavato- \el capitato-incrassatae, guttulis repletae 

 (hymenium eam ob causam inspersum videtur I, septatae, indivisae vel rarius 

 furcatae. Asci parce evoluti, subcylindrici vel saccato-ellipsoidei, 40 |7. longi, 

 12 — 13 \x crassi, membrana apice valde incr^ssata. Sporae parcissime 

 evolutae (duas solum vidimus), ellipsoideae vel ellipsoideo-fusiformes, sub- 

 pellucidae, 11. 8 — 13.2 \j. longae, 4.7 — 5.2 \j. crassae. 



React. Asci J persistenter caerulescentes, hymenium praeterea sor- 

 dide flavo-fuscescens, hN'pothecium dilute in caerulescentem tingitur, cortex 

 normalis et infrah3'pothecialis fusco-rubentes. Medulla non amyloidea. 



Fertile plants of this species are extremely rare in the whole world. 

 Brlxe Flnk's microscopical statements* agree well with mine, only that 

 he found smaller spores: 5 — 7.5 by 4 — 5.5 [/.. — I have only seen this 

 one fertile specimen (with one apotheciumi from Norway, which I detected 

 at Grefsenaasen near Kristiania. Sommerkelt found fertile specimens in 



1 Lieh, of Minnesota p. 202. 



Vid.-Selsk. Skr. L M.-X. Kl. 1921. Xo. 7. 13 



