Punctelia stictica (Duby) Krog

Brun punktlav

Red list categories: Norway: R , Sweden: - , Finland: - , EU: +
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 24 localities in the continental valleys of southeastern and western Norway (Gudbrandsdal, Valdres, and Sogn) - Counties:: Op, SF. - Vegetation regions: southern to northern boreal. - Altitude: From about sea-level to 940 m

World distribution: The species is widespread but scattered in Europe, Africa, Greenland, and North and South America (Hale 1965, Krog 1970, Egan 1987, Swinscow & Krog 1988). In Europe, the species occurs partly in continental areas of Norway, Switzerland, and Italy, and partly in suboceanic areas of France and Portugal (Krog 1970, Buschardt 1979)

Ecology: Results. The substrate (indicated in 21 localities) included rocks, boulders, and cliffs (17), stone walls (2), tombstones (1), and the trunk of Sorbus aucuparia (1). The rock type was indicated as schistose in 3 localities and calciferous in 2 localities. The habitat (indicated in 18 localities): Roadsides (7), meadows (3), by rivers or lakes (3), near churches or in churchyards (2), deciduous forests (2), and near a quay (1). Recorded aspects were southern (4), southwestern (1), and northern (1). Discussion. The species is saxicolous, apart from one collection of corticolous specimens (3579). There is little information on rock type, but the collections are made mainly in areas with calciferous rock. Most localities appears to be open habitats in old agricultural landscapes. It is possible that the primary habitats are rocks near rivers and lakes (3587, 3596, 3609) and deciduous forests (3579, 3595). According to Krog (1970), observations in Norway indicate that the species prefers open, sunny habitats and possibly also somewhat calcareous rocks. The annual precipitation at the sites ranges from less than 300 mm (3595, 3596) to 700-1000 mm (3589, 3592, 3690; cf. Førland 1993). The localities are situated in a distinctly continental area, but the species does not occur in the locally most arid sites together with the 'steppe element'. Similar observations are reported for the species in northern Italy (Buschardt 1979)

Threats: Results. Recorded threats at the three investigated sites were overgrowth by grasses and shrubs due to changes in land use (2), hydroelectric power development (1), and logging (1). Discussion. Since the species seems to have its main occurrences at exposed sites in old agricultural landscapes, we assume that it is threatened by overgrowth by grasses and shrubs due to changed land use

Status: Only one of the old localities was investigated; the species was present. Two new localities were discovered. No localities are protected

Specimens in other herbaria, litterature, etc.

  • OPPLAND, LOM, Bøverdalen, 1 km SW of Lom church, UTM: MP 76 55, alt.:, on boulder in birch forest, 1937, Ahlner S. (Krog 1970: 13)
  • OPPLAND, LOM, Bøverdalen, Offigsbø, UTM: MP 74 54, alt.: 420 m, on north exposed cliff by the river, 1948, Ahlner S. (Krog 1970: 13)
  • OPPLAND, NORD-AURDAL, Leira, Djupedalen, UTM: NN 14 60, alt.: 360-500 m, on south exposed cliff close to the main road, 1937, Ahlner S. (Krog 1970: 13)
  • OPPLAND, NORD-FRON, Øya, UTM: NP 43 28, alt.: 260-320 m, on schistose cliff by the road, 1937, Ahlner S. (Krog 1970: 13)
  • OPPLAND, NORD-FRON, Øya, UTM: NP 43 28, alt.: 260-320 m, on schistose cliff by the road, 1949, Ahlner S. (Krog 1970: 13)
  • OPPLAND, RINGEBU, Vekkom, Våle, UTM: NP 61 22, alt.: 350 m, on south exposed cliff by the road, 1948, Ahlner S. (Krog 1970: 13)
  • OPPLAND, SEL, Kleivbroen near Tyvspranget, UTM: NP 23 39-40, alt.: 320 m, on south exposed cliffs, 1949, Ahlner S. (Krog 1970: 13)
  • OPPLAND, SEL, Solgjem, UTM: NP 29-30 46, alt.: 420 m, on schistose rocks, 1949, Ahlner S. (Krog 1970: 13)
  • OPPLAND, SØR-FRON, Rudland, UTM: NP 52-53 24-25, alt.:, on cliff by the main road, 1937, Ahlner S. (Krog 1970: 13)
  • OPPLAND, SØR-FRON, Oden, UTM: NP 49 25, alt.:, on rock wall by the road, 1937, Ahlner S. (Krog 1970: 13)
  • OPPLAND, SØR-FRON, W of Forr, UTM: NP 53-54 24, alt.:, , 1949, Ahlner S. (Krog 1970: 13)
  • OPPLAND, VESTRE SLIDRE, Reie, UTM: NN 01-02 69-70, alt.:, on southwest exposed cliff in meadow, 1937, Ahlner S. (Krog 1970: 13)
  • OPPLAND, VESTRE SLIDRE, Lomen, Kvåle, UTM: MN 97 76, alt.:, , 1937, Ahlner S. (Krog 1970: 14)
  • OPPLAND, VESTRE SLIDRE, Kvåle, near Strondafjorden, UTM: , alt.:, on boulder in meadow, 1937, Ahlner S. (Krog 1970: 14)
  • OPPLAND, VÅGÅ, Fellese, UTM: NP 02 59, alt.: 400 m, on boulder in meadow, 1948, Ahlner S. (Krog 1970: 14)
  • OPPLAND, VÅGÅ, Lye, UTM: NP 03 59, alt.: 400 m, on boulder by the road, 1948, Ahlner S. (Krog 1970: 14)
  • OPPLAND, VÅGÅ, Nedre Sjodalsvatn, UTM: MP 95-97 23-25, alt.: 940 m, on boulder in the lake, 1952, Ahlner S. (Krog 1970: 14)
  • SOGN OG FJORDANE, AURLAND, Vassbygdi, UTM: MN 09-10 49-50, alt.:, På stor blokk, 1970, Øvstedal D.O. (BG)
  • SOGN OG FJORDANE, AURLAND, Flåm, straks ved Flåm, UTM: , alt.:, På steingjerde, 1975, Jørgensen P.M. & Østhagen H. (BG)