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10 Astri Botnen Specimen seen: Norway . Hordalard: Os, Bjornen, W of Bjornatrynet, UTMED: LM 02 71, 1981, Botnen 81125 (BG). Acknowledgements I thank Per Magnus Jorgensen and Tor Tsnsberg, both Bergen, for discussions. References Botnen, A. 1988: Lichens new to Norway. Graphis Scripta 2: 6-8. Degelius, G. 1954: The lichen genus Collema in Europe. Symb. Bot. Upsal 13, 2: L-499. GRAPHTS SCRTPTA 8 (1997) Degelius, G. 1974: The lichen genus Collema with special reference to the extra-European species. Symb. Bot. Upsal. 20, 2: l-215. Nimis, P. L. 1993: The lichens of ltaly. An annotated catalogue. Museo Regionale di Scienze Naturali, Torino. Santesson, R. 1993: The lichens and lichenicolous fungi of Sweden and Norway. SBTforlaget, Lund. Tonsberg, T., Gauslaa, Y., Haugan, R., Holien, H. & Timdal, E. L996. The threatened macrolichens of Norway - 1995. Sommerfeltia 23: I-258. Wirth, V. 1995: Die Flechten Baden-Wilrttembergs. Ed. 2. Eugen Ulmer, Stuttgart.
Lecanora cinereofusca in Norwry, a rare and endangered lichen HAKON HOLIEN Holien, H. 1997: Lecanora cinereofusca in Norway, a rare and endangered lichen. Graphis Scripta 8; 11-15. Stockholm. ISSN 0901 -7593. The distribution of Lecanora cinereofusca in Europe is mapped. Notes on its substratum and habitat demands are given and associate lichen species are listed. The species shows an oceanic distribution in Europe being restricted to western Norway, western Scotland and the Alps. The main threats to the species are forestry activity and various forms of development. The species is endangered in Norway, possibly also in Europe as a whole, ild some proposals for a conservation strategy are given. Hdkon Holien, Department of Resource Sciences, Nord-Trondelag College, Kongensgate 42, N-77M Steinkjer, Norway. The Lecanora subfusca group is generally charactertzed by having apothecia with reddish brown discs, calcium oxalate crystals in the usually distinct and corticate thalline margin, and the presence of atranorin causing a K + yellow reaction. The group has been treated in North America by Brodo (1984), in Japan by Miyawaki (1988), ffid recently in Australasia by Lumbsch (1994). In Europe, a recent study on the sorediate, saxicolous species of the group was published by Brodo et al. (1994). A revision of the corticolous European species of the L. subfu,rca group is strongly needed. Within the group , L. cinereofusca H. Magn. (syn. L. degelii Schauer & Brodo) is usually easy to recognize, even in the field, by its rather large, half immersed apothecia with a usually distinctly rugulose thalline margin (Figure 1). It is corticolous on smooth barked deciduous trees and is the only species in the Z. subfusca group containing pannarin and placodiolic acid. The aim of this paper is to present the status of the species in Norway with emphasis on central Norway. Its distribution, habitat, substratum demands and main threats are discussed. Distribution In Norway , Lecanora cinereofusca has been recorded from the coastal areas of Hordaland (Jorgensen 1984) to Nordland. Most specimens are from central Norway. Its altitudinal distribution ranges from sea-level to about 200 m (Sogn og Fjordane); most central Norwegian localities are situated lower than 100 m. The northernmost locality in Norway is Liatreia in Brarnoy, Nordland which is the northern limit for several other interesting lichens, e.g. Sticta fuIiginosa (Haugan et al. 1995). According to Santesson (1993) , L. cinereofusca has previously been recorded in Norway only from Hordaland and Ssr-Trcndelag. At present the species is known from 16 localities. One locality is within a forest reserve (Nord-Trondelag, Namsos, Almdalen). Elsewhere in Europe L. cinereofusca is known from Scotland where it is very rare (Hawksworth & Dalby 1992) and from the Alps (Schauer 1965, Schauer & Brodo 1966, Ttirk & Wittmann 1986, Dietrich I99L, Bolognrm L992, Nimis L993) where it is regarded as threatened. In the Alps it occurs at altitudes between 700 and 1300 m (Schauer & Brodo 1966). The
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