Physcia magnussonii Frey

Rimrosettlav

Red list categories: Norway: R , Sweden: R , Finland: - , EU: +

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 19 localities, partly in the more or less continental valleys in southeastern and western Norway, partly in the Trondheimsfjord area in Trøndelag - Counties:: Op, SF-NT. - Vegetation regions: boreonemoral to low alpine. - Altitude: From about sea-level to 1150 m

World distribution: The species occurs in Europe, Greenland, and the U.S.A. (Sernander-Du Rietz 1969, Moberg 1977, Esslinger 1979); it is also reported from the Canary Islands (Nimis 1993). It is a rarely collected species throughout its range. In Europe, the species occurs in Scandinavia and in the Central European and Mediterranean mountains (Wirth 1972, Nimis 1993). The Scandinavian distribution is mapped by Moberg (1977); in Sweden the species is scattered in the southern and central parts of the country

Ecology: Results. The substrate (indicated in 14 localities) was exclusively rock, in 5 localities specified as calciferous, schistose, or greenstone. The habitat (indicated in 14 localities) was boulders or steep to overhanging rock walls, in 8 localities indicated as facing from southeast to west. Discussion. Despite statements that the species prefers acidic rock (Poelt 1969, Sernander-Du Rietz 1969, Moberg 1977), Flatberg et al. (1975) found the species in Trøndelag mainly on basic rocks (greenstone). According to Wirth (1972), the species grows on somewhat acidic calciferous rock in Central Europe, and according to Nimis (1993) on base-rich siliceous rock in Italy. Norwegian material (with the possible exceptions of 1093, 1228, and 1942) apparently originate from more or less basic rocks. No Norwegian specimens are reported from growing in ornithocoprophilous (or even nitrophilous) sites; in agreement with Moberg (1977), but contrasting the opinion of Sernander-Du Rietz (1969). Some localities, especially those in Trøndelag, are situated in agricultural landscapes

Threats: Results. Forestry was recorded as the possible reason for extinction in locality 2062. Discussion. No specific threats are known. For localities in agricultural landscapes, we assume a change of land use may result in overgrowth by grasses and shrubs

Status: Three old localities were investigated; the species was present in one (1090), extinct in one (2062), and of uncertain status in one (2255). No new localities were discovered. No localities are protected

Specimens in other herbaria, litterature, etc.

  • MØRE OG ROMSDAL, NORDDAL, Sylte, UTM: MQ 09-10 08, alt.:, by the river near the shore, 1947, Magnusson A.H. 20503 (UPS)
  • NORD-TRØNDELAG, INDERØY, Kløvstad, UTM: PR 14 92, alt.: 40 m, bergskrent SØ-vendt, 1973, Flatberg K.I. (TRH)
  • NORD-TRØNDELAG, LEVANGER, nedenfor Lillemarken, UTM: PR 11 70, alt.:, , 1938, Dahl E. (Flatberg et al. 1975: 240)
  • NORD-TRØNDELAG, LEVANGER, Skjelstad, UTM: PR 03 58, alt.:, rik bergskrent ved vegkanten, 1973, Flatberg K.I. (TRH)
  • OPPLAND, VÅGÅ, Vågåmo, Prestberget, UTM: NP 04 60, alt.: 410 m, klippor på S-sidan, 1948, Ahlner S. (S)
  • OPPLAND, VÅGÅ, Sjodalen, Kampen, UTM: MP 99 24, alt.: 1150-1160 m, S-brant, 1952, Ahlner S. (S)
  • OPPLAND, VÅGÅ, Nordherads Solsida, ca 1 km E of Lye, in the steep N slope just N of the road, UTM: NP 044 598, alt.: 370 m, on the vertical SE side of a big boulder, 1969, Moberg R. 1210 (UPS)
  • SOGN OG FJORDANE, AURLAND, Vassbygdi, UTM: MN 09-10 49-50, alt.:, , 1972, Øvstedal D.O. (BG)
  • SOGN OG FJORDANE, LÆRDAL, Lærdal, UTM: , alt.:, , , Sommerfelt S.C. (S)
  • SOGN OG FJORDANE, LÆRDAL, Lærdal, UTM: , alt.:, , , Sommerfelt S.C. (UPS)
  • SOGN OG FJORDANE, LÆRDAL, Husum, UTM: MN 34-35 68, alt.:, , 1956, Magnusson A.H. 24823 (UPS)
  • SØR-TRØNDELAG, MELHUS, N for Hågån, UTM: NQ 64 94, alt.:, , 1972, Flatberg K.I. (TRH)
  • SØR-TRØNDELAG, MELHUS, Vollaberga, UTM: NQ 63 97, alt.:, V-vendt overheng, 1972, Flatberg K.I. & Frisvoll A.A. (TRH)
  • SØR-TRØNDELAG, TRONDHEIM, Haugbjørg, UTM: NR 60 26, alt.:, skifrig bergskrent ovf. vegen, 1972, Jørgensen P.M. (BG)
  • SØR-TRØNDELAG, TRONDHEIM, Haugbjørg, UTM: NR 60 26, alt.:, skifrig bergskrent ovf. vegen, 1972, Jørgensen P.M. (TRH)
  • SØR-TRØNDELAG, TRONDHEIM, Byneset, Myrsund, UTM: NR 59 27, alt.:, , 1972, Frisvoll A.A. (TRH)
  • SØR-TRØNDELAG, TRONDHEIM, Byneset krk., UTM: NR 55 26, alt.:, bergskrent, 1972, Flatberg K.I. & Frisvoll A.A. (TRH)
  • SØR-TRØNDELAG, TRONDHEIM, Einan, UTM: NR 53 30, alt.:, SV-vendt overheng, 1972, Flatberg K.I. & Frisvoll A.A. (TRH)
  • SØR-TRØNDELAG, TRONDHEIM, Haugbjørg, UTM: NR 60 26, alt.:, på grønnstein, 1972, Jørgensen P.M. (BG)
  • SØR-TRØNDELAG, TRONDHEIM, lia Ø for Tomset, UTM: NR 72 29, alt.:, , 1973, Flatberg K.I. & Frisvoll A.A. (Flatberg et al. 1975: 240)
  • SØR-TRØNDELAG, TRONDHEIM, Hangervåttan, S-sida, UTM: NR 54 28, alt.: 140 m, S-eksp. bergvegger (delv. overheng), 1974, Flatberg K.I. (TRH)
  • SØR-TRØNDELAG, TRONDHEIM, Byneset krk., UTM: NR 56 25, alt.: 60 m, på berg, 1979, Holien H. 125-79 (TRH)
  • SØR-TRØNDELAG, TRONDHEIM, Hangervåttan, UTM: NR 54 27, alt.: 120-140 m, på kalkrikt berg, 1981, Holien H. 25-81 (TRH)
  • SØR-TRØNDELAG, TRONDHEIM, Byneset, Høgstein, UTM: NR 55 25, alt.: 60-80 m, on SE facing rocky wall, 1981, Tønsberg T. 6309 (TRH)