I 92 I. No. 7. STUDIES ON THE LICHEN FLORA OF NORWAY. I 87 



6. Cetraria tenuissima iL.) Wain. 



var. campestris Schaer. 

 Syn. Cetraria aciilcata (Schreb.I Fr. 



Branches compressed, dilatatcd and lacunose at die angles. Thallus 

 usually castaneous, not ver}- fragile, fistulöse. Spores ellipsoid, 8 — 9X 



4—4-5 !^- 



Varies : 



The t^-pe is not caespitose, but there is ever}' intermediate stage be- 

 tween openlv branched plants and densel}- caespitose ones [ï.alpina Schaer.). 



The Norwegian material is but sparingly spinulose, if the branches are 

 densely spinulose, it is f. acauthclla Ach. 



The obtiisata Schaer. is a very robust plant with obtuse apices. 



ösff. Fredriksstad: Oren (B. L.), and Græsvik (B. L.), Eloen (B. L.). 

 AkcrsJi. Holand: Skullerud, f. acauthclla (B. L.), Nesodden, f. alpina (Moe), 

 Aker: Hovedøen, f. obtiisata (Moe) and f. typ. (H.), Smestad (Moe), Alunver- 

 ket (Boeck), Asker: Langaaren (Kiær). F<rs//". Amasser (B. L.), TjoUing (Høeg), 

 Larvik (Norm.). Busk. Modum (Moe), Nore: Hallandsfjell (Kiær). 



Tclciii. Litjell (Hoch). Aiistagd. Lyngor (B. L.), Evje: Stenstjell (Sor.), 

 Bvgland: Grænna (Sør). Vcstagd. Hægeland (Sør.), Mandal: Risøbank 

 (B. L.), and Skjernoen, f. acauthclla (B. L.). Rog. Rægefjord (H.), Sogndals- 

 fjellet, f. acauthclla (H.), Egersund (H.), Ogne (H.). 



Hord. Moster, f. acauthclla (H.), Fitjar: Tjuaholmen (Lid), Store Kalsø 

 (B. L.), Strandebarm: Tangeraas (Lillef. ), Fusa: Baldersheim (Lillef.), 

 Bergen: Sandviken (H.), Sæim (B. L.), Gran vin: Skaalsæte (H.). 



Hed. Ringebu, f. alpiua (Somrft.). Opl. Fokstuen, f. alpiua (M. N. Bl.), 

 Jerkin (Zett.), X'aagemo, i. alpina (B. L.), Lom: Ulstad (B. L.). 



Sortr. Kongsvoll (Zett.), Drivstuen (Th. Fr.), Trondhjem: Korsviken 

 (Kindt), Hitteren (Nor:\i.). Nordtr. Stjordalen (Somrft.). 



Nordl. Torghatten (Lid), Selsø (Norm.), Bodø (Somrft.,), Saltdalen, 

 f. alpiua (Somrft.), Steigen: Laskestad (Norm.). Troms. Harstad (B. L.), 

 Ibbestad, i", alpiua (B. L.), Bardo: Innset, f. alpiua (B. L.), \'ikran, f. alpiua 

 (B. L.), Tromso common, tvp. et f. alpiua (Norm.), Mikkelvik (B. L.), Karise 

 (Malmgr.), Lyngen: Goalsevarre, ad acauthcllaiu (B. L.) and Skibotn (B. L.). 

 Fiiuu. Alten: Økstjord, f. alpiua (Baur), and Sakkobani (B. L.); Maaso 

 (Th. Fr.), Hammerfest (Wbg.), Gjesvær (Th. Fr.), Honningsvaag (B. L.); 

 Lakseijord: Nordkyn (B. L.), and Lebesby (B. L.); Tana: Mehavn (H.), Berle- 

 vaag (B. L.), Risfjorden (B. L.), \^esterbugt (B. L.), and Langnes (B. L.); 

 X'aranger: Havningberg (Norm.), \'adsø, f. a/^/;w (Th. Fr.), Bugønes (Norm.)- 



