Leptogium burgessii (L.) Mont.

Kranshinnelav

Red list categories: Norway: V , Sweden: - , Finland: - , EU: V
Fennoscandian responsibility species

By The threatened macrolichen project, - updated 11.08.1996.
[Map] Sources for map data: All relevant herbaria and literature
Abbreviations, map symbols and standard references
Norwegian distribution: The species is known from 16 localities in southwestern Norway - Counties:: Ro-SF. - Vegetation regions: nemoral, boreonemoral, and lowland belt of coastal section. - Altitude: From about sea-level to 170 m

World distribution: The species is known from Europe, North America, South America (Ecuador), Africa, Asia, and New Zealand (Coppins & Purvis 1992). In Europe it is western, and shows a western British Isles - western Norway disjunct distribution. In Fennoscandia the species is restricted to Norway

Ecology: Results. The substrate (indicated in 14 localities) was more or less moss covered rocks and rock walls (7) and tree trunks (7). The trees were pollarded trunks of Fraxinus excelsior (5), Populus tremula (1), Quercus sp. (1), and Ulmus glabra (1). In one site (128), it was saxicolous as well as corticolous. It usually occurred over mosses, especially when corticolous. The habitats (indicated in 12 localities) included broad-leaved deciduous forests (8) in the old cultural landscape (4), big boulders in screes (2), deciduous forest (1), near roadside bank (1), sea-shore cliffs (1), and brook ravine (1). Recorded aspects were western (4), eastern (1), northern (1), northeastern (1), southern (1), and southeastern (1). Discussion. Leptogium burgessii is a species of more or less moss covered rock and bark of broad-leaved deciduous trees. Pollarded, moss covered trunks of Fraxinus excelsior appears to be its principle substrate when corticolous. On F. excelsior, the species sometimes forms extensive patches. Unlike Leptogium hibernicum, which in Norway seems to be restricted to old pollards trunks of F. excelsior, L. burgessii is less substrate specific as it also inhabits rock and occurs on trees other than F. excelsior. Leptogium burgessii is typical of old hardwood forests in lowland Britain (Rose 1976). According to Seaward & Hitch (1982), L. burgessii is a species of bark, more rarely of rocks in very sheltered, humid valley- and streamsides with a high annual rainfall (more than 2000 mm); the substrate is dominated by species with blue-green photobionts. Leptogium burgessii is extinct in many of its old habitats in England and Wales (Seaward & Hitch 1982)

Threats: Results. The lack of active pollarding is a serious threat to the corticolous populations. Other threats include road construction, abrasion by man, and pollution (1343), building on the site (731), planting of Picea (1426), and logging (128)

Status: Nine old localities were investigated; the species was found in 3, regarded as extinct in 2, and as uncertain in 4. Three new localities were discovered. Thus the species is today known to be present in 6 sites. In one site in Etne (1343) it showed vigorous growth and almost entirely covered the north-facing side of a trunk from the base and up to 1.5 m; the largest thallus was about 30 cm in diameter. One locality (3527) is in a protected area

Specimens in other herbaria, litterature, etc.

  • HORDALAND, AUSTEVOLL, Møgster, UTM: KM 82 65, alt.: 1-20 m, , 1967, Jørgensen P.M. (UPS)
  • HORDALAND, ETNE, Skånevik, NE om kyrkan, UTM: LM 28 25, alt.:, på Fraxinus, 1967, Hakelier N. (BG)
  • HORDALAND, ETNE, Skånevik, NE om kyrkan, UTM: LM 28 25, alt.:, på Fraxinus, 1967, Hakelier N. (UPS)
  • HORDALAND, ETNE, Åkrafjord, ca. 5 km SV Rafdal, UTM: , alt.:, Fuktig bäckravin. På mossig stam av Quercus, 1973, Arvidsson L. (GB)
  • HORDALAND, ETNE, Åkrafjorden, sluttningen mellom Tjelmeland och Rafdal, UTM: , alt.:, På Fraxinus och Ulmus, 1985, Hultengren S. (GB)
  • HORDALAND, ETNE, Åkrafjord, sluttningen 1 km sydväst Rafdal, UTM: LM 40 31, alt.:, På mossig bergvägg, 1985, Hultengren S. (GB)
  • HORDALAND, ETNE, E of Åkrafjorden, Perahaugen, just E of the road, UTM: LM 395 299, alt.: 170 m, on Fraxinus excelsior, 1986, Gauslaa Y. 86005 (NLH)
  • HORDALAND, ETNE, the NE slope of Mt Prestafjellet, NW of Tungevikstranda, UTM: LM 29-30 25-26, alt.: 150 m, On fraxinus exc., underside of slightly leaning, pollarded trunk, 1993, Tønsberg T. 19605 (BG)
  • HORDALAND, ETNE, E of Åkrafjorden, N of Kyrping, Sæværeidberget, S of Lindehaug, UTM: LM 39 28-29, alt.: 20-200 m, , 1994, Tønsberg T. 19698 (BG)
  • HORDALAND, FUSA, Hopslia, UTM: LM 15-16 90-91, alt.:, på blokker i fuktig, skyggefull edelløvskog, 1979, Blom H.H. (BG)
  • HORDALAND, OS, Berge, UTM: LM 08 80, alt.:, på mossig, besuggad klippa i brant østsluttning med løvskog, 1968, Hakelier N. (BG)
  • HORDALAND, OS, Berge, UTM: LM 08 80, alt.:, på mossig, besuggad klippa i brant østsluttning med løvskog, 1968, Hakelier N. (S)
  • HORDALAND, OS, Storomsvågen, østre del av lia, UTM: LM 01 75, alt.:, , 1979, Blom H.H. (BG)
  • HORDALAND, OS, Bjørnen, S of the small community Bjørnen, the E-facing slope of hill Bjørnahaugen, UTM: LM 029 725, alt.: 30 m, , 1994, Tønsberg T. 19720 (BG)
  • ROGALAND, GJESDAL, strax E om Dirdal v. Frafjorden, UTM: LL 37 26, alt.:, loddrätta strandklippor, 1936, Persson H. (S)
  • ROGALAND, GJESDAL, S-stranden av Frafjorden, udden NØ om Dirdal, tvärbrant i fjorden, UTM: LL 37 26, alt.:, stupbrant klippvägg, 1939, Hasselrot T.E. (S)
  • SOGN OG FJORDANE, ASKVOLL, Atløy, Vilnesvågen, UTM: KP 842 052, alt.:, On a shaded, sheltered mossy rock wall, 1991, Anonby J.E. 698 (BG)