Additions to the lichen flora of Finland. IV

More documents

Recommendations

Info

GRAPHIS SCRIPTA 20 (2008) Additions the the lichen flora of Finland 21 characterized by thick brown thallus, immersed perithecia, well developed involucrellum and rather large spores. In V. apomelaena (A.Massal.) Hepp and V. macrostoma the involucrellum covers only half of the exciple and spores are slightly smaller (20−28 × 10−13 µm). The Finnish specimen has smaller perithecia than those reported by Breuss (2008) from Central and Southern Europe. According to him perithecia are up to 0.5 mm diam. Specimen examined: Uusimaa: Helsinki, Västersundom, Mustavuori, by a lime quarry, house ruins, on concrete foundation, 60°13′N, 25°09′E, 13.IV.2007, 30692. Verrucaria confluens A.Massal. New to Fennoscandia. V. confluens is in most respects similar to V. muralis. In V. confluens involucrella are often fused into groups of 2−5 perithecia (Breuss 2007). In the Finnish material specimens with densely occurring perithecia and several groups of two or three fused involucrella (rarely 4−5 fused involucrella) have been determined as V. confluens. The species is apparently overlooked due to identification problems. Specimens examined: Varsinais-Suomi: Lohja, Lohja, Tytyri lime quarry, 60°16′N, 24°04′E, on E-facing wall, 9.XI.2004, 26176 and on concrete foundation of a fence, 2.VIII.2007, 31735; Västanfjärd, Vesterillo, Illogruvan, abandoned lime quarry, on NW-facing wall, 33267 and on quarry waste pebbles, 33277, 60°01′N, 22°42′E, 24.VII.2008; Karjalohja, Pitkälahti, Yli-Kuoksa, on road cutting of calcareous rock, 60°11′N, 23°45′E, 29.VII.2008, 33583. Uusimaa: Espoo, Suurhuopalahti, S of Majurinkuja, abandoned soil dump, on concrete stone, 60°12′N, 24°50′E, 19.V.2008, 32556. Verrucaria corticola (Arnold) Servít New to Fennoscandia. Description based on the Finnish specimens: thallus thin, medium to dark brown or more rarely green; perithecia small, 0.15−0.2 mm diam., 1/2−3/4-immersed, often covered by thallus; exciple pale; involucrellum thin, extending to the base of the perithecia; spores 10−17 × 4−7 µm. V. corticola comes close to V. dolosa, which is not reported to occur corticolous. The differences between V. corticola and V. dolosa are rather small and the possibility that these species are conspecific cannot be fully excluded. However, at the moment they are considered to be separate species (Breuss 1998). In V. corticola perithecia are commonly thalline covered, but in V. dolosa rarely thalline covered. In V. corticola thallus is in most cases brown, but in V. dolosa in most cases green (although specimens with brown thallus occur). The species occurs on exposed roots of deciduous trees growing at the shoreline of lake Lohjanjärvi. In the same habitat several other Verrucaria species have been found (Pykälä 2008): V. hegetschweileri Körber, V. saepincola Vain. (which is probably conspecific with V. trabalis), V. sorbinea Breuss (which may be conspecific with V. kondaënsis Vain.), V. trabicola Arnold ex Servít (reported in this paper), V. hydrela and some unidentified species. One specimen is from a deciduous stump in a lime quarry. V. corticola has previously been found in Germany (Servít 1949), France (van den Boom & Breuss 2002), and the Czech Republic (Servít 1954). Specimens examined: Varsinais-Suomi: Lohja, Paloniemi, Ollisaari island, shore of lake Lohjanjärvi, on exposed roots of Alnus glutinosa log, 60°15′N, 24°01′E, 6.III.2007, 30143b; Lohja, Paloniemi, Mustasaari island, shore of lake Lohjanjärvi, on exposed root of A. glutinosa, 60°15′N, 24°00′E, 16.III.2007, 30322; Lohja, Ojamo, Ojamo lime quarry, semi-open field of quarry waste soil, on thin stump of Salix caprea?, 60°14′N, 24°02′E, 10.VII.2007, 31291; Karjalohja, Karkali, Karkali strict nature reserve, sandy shore of lake Lohjanjärvi, on exposed root of A. glutinosa, 60°14′N, 23°47′E, 5.X.2007, 32052, 32106.
22 Juha Pykälä GRAPHIS SCRIPTA 22 (2010) Verrucaria elevata (Nyl.) Zschacke New to Fennoscandia. Description based on the Finnish specimens: thallus thick, brown, areolate; areoles 0.3−0.7 mm diam.; perithecia and exciple 0.2−0.25 mm diam., immersed, with 1−5 perithecia per areole; exciple dark; involucrellum rather thick, to the base of the perithecia; spores 15−23 × (7−)8−12 µm. The Finnish specimens seem to have smaller exciple and areoles than those reported by Breuss (2008) from Austria and the Czech Republic. According to Breuss the exciple of V. elevata is 0.2−0.4 mm diam. and the areoles are 0.5−0.8 mm diam. V. elevata is superficially similar to V. apatela, V. apomelaena and V. macrostoma. These species have larger spores. In V. apomelaena and V. macrostoma involucrellum does not reach to the base of the exciple. Specimens examined: Varsinais-Suomi: Lohja, Vappula, 200 m W-NW of Jusola, house ruins, on concrete pillar, 60°13′N, 23°59′E, 20.V.2006, 28588; Karjalohja, Pitkälahti, Yli-Kuoksa, on road cutting of calcareous rock, 60°11′N, 23°45′E, 29.VII.2008, 33570; Lohja, Jalassaari, 200 m SW of Jalassaari, Alnus incana-dominated shore forest of lake Lohjanjärvi, path, on pieces of cement plates, 60°12′N, 23°52′E, 11.IX.2008, 33708; Karjalohja, Saarenpää, Saarenpäänniemi, calcareous rock on shore of lake Lohjanjärvi, on small SW-facing wall, scarce, 60°13′N, 23°46′E, 7.X.2008, 34041. Verrucaria endocarpoides Servít New to Fennoscandia. The perithecia (0.25−0.3 mm diam.) are immersed in areolate brown thallus. The exciple is dark. The involucrellum is appressed to the exciple and extends to the exciple-base level. The spores are 20−26 × 8−11 µm (Breuss 2007). V. endocarpoides superficially resembles V. nigrescens, but it lacks a dark basal layer. V. endocarpoides is close to V. fuscoatroides Servít and V. nigrofusca Servít (both lacking dark basal layer as well), but differs in having immersed perithecia (3/4-immersed to hemispherically prominent in V. fuscoatroides and V. nigrofusca) and stouter periphyses (Breuss 2007). The spores of V. fuscoatroides tend to be larger (23−30 × 10−13 µm) and those of V. nigrofusca smaller (17−23 × 8−10 µm) (Breuss 2007). Specimens examined: Varsinais-Suomi: Lohja, Marttila, Savilahdensalmi, SW-slope, coniferous forest, on calcareous stone, 60°14′N, 23°52′E, 21.VI. 2005, 27101; Lohja, Isoteutari, Pyttberget, dump, on cement brick, 60°09′N, 23°59′E, 1.IX.2007, 31898; Särkisalo, Förby, Vähämaankaula, abandoned lime quarry, on stones, 60°05′N, 22°52′E, 23.VII.2008, 33021; Västanfjärd, Vesterillo, Illogruvan, close by abandoned lime quarry, on calcareous rock, 60°01′N, 22°42′E, 23.VII.2008, 33204; Nummi- Pusula, Pusula, by the commune center, abandoned lime quarry, on SW-slope, 60°28′N, 23°59′E, 27.VIII.2008, 33475. Verrucaria fuscoatroides Servít New to Fennoscandia. Description based on the Finnish specimens: thallus areolate, pale to medium brown; areoles 0.2−0.6 mm diam.; perithecia and exciple 0.2−0.35 mm diam., (1/2−)3/4-immersed; exciple dark; involucrellum thick, to the base of the perithecia; spores (20−)23−29 × 9−12(−14) µm. V. fuscoatroides is a widely distributed species (Breuss 2007, 2008). Outside Finland the nearest sites are in Poland (Faltynowicz 2003). The species usually occurs on sun-exposed sites on calcareous as well as on siliceous rocks. Specimens examined: Varsinais-Suomi: Lohja, Marttila, 400 m NE of Martti, on small calcareous rock surrounded by abandoned fields, 60°14′N, 23°52′E, 29.IV.2004, 24787, 24794; Lohja, Hermala, Painiemi, clear cut forest, Wslope, on calcareous stone, 60°13′N, 23°52′E, 6.VI.2005, 26969; Lohja, Suittila, 500 m NE of Pätärilä, pyroxene gneiss rock, on E-slope, 60°20′N, 24°06′E, 7.IX.2008, 33681; Lohja, Kouvola, Kolomäki, pyroxene gneiss rock, on SE-slope, 60°20′N, 24°06′E, 7.IX.2008, 33692.
Page 1 and 2: Additions to the lichen flora of Fi
Page 3: 20 Juha Pykälä GRAPHIS SCRIPTA 22
Page 7 and 8: 24 Juha Pykälä GRAPHIS SCRIPTA 22
Page 9 and 10: 26 Juha Pykälä GRAPHIS SCRIPTA 22

Additions to the lichen flora of Finland. IV

Create successful ePaper yourself

Delete template?

Save as template?