GMPHIS SCRIPTA - Universitetet i Oslo

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NLF on Internet NLF has opened a home page on the World So far, the page contains general information Wide web: about the association, links to lichenological sites and herbaria, and updated information http://www.systbot.uu.se/additions/NlF/NlF. about the excursion in Iceland. html
Collema callopismum new to Norway ASTRI BOTNEN The peninsula Bjornen, southwestern Norway, has a rich lichen flora, probably due to the oceanic climate, the variable geology with a bedrock ranging from quartsitic through calciferous and schistose to calcareous, the variable topography, and the rich and variable forest vegetation. The area is fairly well investigated lichenologically and several rare lichen species have been found here, e.g. Acrocordia salweyi, Claurouxia chalybeioides, Gyalecta derivata, Lecidea ahlesii, Micarea lithinella, Opegrapha mougeotii, Parmeliella testacea, Polyblastia inumbrata, Porina ahlesiana, Pseudoqphellaria intricata, and Sphaerophorus melanocafpus (Botnen 1988, Tonsberg et al. L996, see also Santesson 1993). The aim of this article is to report on a find of CoIIema callopismum, the first record from Norway. Collema callopismum Massal. Botnen, A. t997: Collema callopismum new to Norway. Graphis Scripto: g-lG. Stockholm. ISSN 0901-7593 . Collema callopismum is reported as new to Norway from Hordaland, southwestern Norway. Astri Botnen, Department of Botany, (Jniversity of Bergen, Attdgaten 41, N-5007 Bergen, Norway. On a world-wide base the species is the only member of the " Collema callopismum-group" (Degelius L974) characterized by the small, separate, subcrustose, subumbilicate areoles, the small apothecia, and the submuriform spores (Degelius 1954). According to Degelius ( I9S4), two varieties occur, one with smaller spores (17 -26 x 8.5-10.5 (-13) pm) and usually 3 transversal septa (var. callopismum), and one with larger spores ((20-)26-38(-45) x (9-)12- 15 pm) and usually 4-5 transversal septa {var. rhyparodes). Collema callopismum is usualiy easily recognized by the characteristic arealrs. Poorly developed specirnens of this speeies anci of C. fragranr are sometimes similar, and may have to be separated anatornically by deraiis in the excipulum proprium (see Degelius lg14) " However, as C. callopismwm is saxicolous anet C. fragrans corticolous, confusion between tirern is unlikely. Collema callopismunt is a species on calcareous rock, known from Europe, Greenland, North America and Japan (Degeliurs 1954, 1974). In Europe it occurs frcm rhe Mediterranean region as far north as north*rn Sweden (Nimis L993, Santesson tgg3, \ii/irth 1 e95). The Norwegian material, comprising orrf; specimen, is well-developed, richiy ferrile and belongs to var. callopismurn (spores I7-ZS x g- 10 pm, with 3 transversal septa)" The habitas was a seepage track on an overhanging, ealeareous outcrop in a conglomeratic rock r,vall. 'fhe specimen grew over a dark crust of cyanobacteria, close to sea-level. Associated lichens included e.g. Acrocordia macrospora, Torcini.a aromatica, and Verrucaria spp. Collema callopismum is apparently rarfi firi Bjornen, being found only once. However, due to its inconspicuous thallus it is easily {}ver looked.
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