Additions to the lichen flora of Finland. II. Calcareous rocks and ...

28 Juha Pykälä GRAPHIS SCRIPTA 19 (2007)
finds suggest that V. rejecta may be more widely
distributed, also occurring on artificial calcareous
habitats.
Specimens examined: Paavola, Hausnummi, on
small flat calcareous rock, 60°13'N, 23°52'E,
6.VI.2005, 26958; Kirkonkylä, former Virkkala
cement factory, on cement, 60°11'N, 23°59'E,
15.VII.2005, 27324; Lohja, Pitkäniemi, shore of
lake Lohjanjärvi, on flat calcareous rock,
60°15'N, 24°02'E, 19.VIII.2005, 27550; Lohja,
Pitkäniemi, on lime quarry, 60°15'N, 24°03'E,
23.VIII.2005, 27665.
Verrucaria ruderum
New to Finland. V. ruderum has a thin white
thallus, small (0.2 mm large) immersed
perithecia, a thick apical involucrellum, a pale
exciple and large spores (23–30 × 13–18 µm;
Zschacke 1933). The species has previously been
found once in Fennoscandia, in Sweden
(Santesson et al. 2004). V. ruderum is clearly
different from any other Fennoscandian
Verrucaria species, and the few finds therefore
suggest that it is truly rare.
Specimens examined: Ojamo, Liessaari, on shore
of lake Lohjanjärvi, on a NW-facing calcareous
rock wall, scarce, 60°14'N, 24°01'E, 15.IV.2005,
26520; Moisio, Lohjanharju esker, pine forest, on
top of a calcareous stone, scarce, 60°15'N,
24°06'E, 30.X.2005, 28195.
Verrucaria schindleri
New to Finland. V. schindleri is similar to V.
muralis, but has a brown exciple (Breuss 2002).
The exciple of V. muralis often turns brown in
overmature perithecia (Breuss 2002). Thus, these
two species are difficult to separate from each
other. V. schindleri may be conspecific with V.
epilithea sensu Vainio (1921).
Specimens examined: C. 20 localities, on
calcareous rocks, lime quarries, concrete and
cement. Hermala, Kyttälä, on flat calcareous
rock, 60°13'N, 23°51'E, 6.VII.2004, 24987, det.
O. Breuss 2005.
Verrucaria transiliens (Arnold) Lettau
New to Fennoscandia. In V. transiliens, the
involucrellum surrounds the perithecium and the
epilithic thallus is brown (Breuss 2004). In the
Lohja collection spores (22–28 × 11–13 µm) are
narrower than those reported in Zschacke (1933)
and Breuss (2004), but close to the size given by
Servit (1950): 22–26 × 12–15 µm.
Specimens examined: Skraatila, Päivärinta SW,
by the shore of lake Lohjanjärvi, on a small
rather flat calcareous rock surrounded by gneissic
rocks, 60°15'N, 23°53'E, 24.VIII.2005, 27777,
27779.
Verrucaria viridula
V. viridula grew on south-facing calcareous rocks
and on south- and west-facing surfaces of lime
quarries close to unmined rocks. All populations
were small.
Specimens examined: Lohja, Kiviniemi, on a Wfacing
wall of a lime quarry, 60°15'N, 24°03'E,
11.VII.2003, 23162, the locality was destroyed in
2004 due to building; Torhola, E of Torhola
cave, on a SW-facing calcareous rock, 60°15'N,
23°52'E, 30.VII.2003, 23338; Hermala,
Kalkkimäki, in a lime quarry, 60°13'N, 23°51'E,
29.VIII.2003, 23495, 19.VII.2004, 25115;
Hermala, Pietilä, in a lime quarry, 60°13'N,
23°51'E, 30.IX.2004, 25879; Seppälä, Mustasaari,
on calcareous rock, 60°14'N, 23°51'E,
10.VIII.2004, 25394 & R. Murto; Lohja, Lindkullanmäki,
on calcareous rock, 60°15'N,
24°04'E, 18.IV.2004, 24446b.
Vezdaea retigera
New to Finland. V. retigera has previously been
reported only once in Fennoscandia, on a mortar
wall in Norway (Tønsberg 1990). The finds in
Lohja were on calcareous soil. In the British
Isles, V. retigera is usually found on lead-rich
soil (Coppins 1987, Purvis 1992b), and a Danish
find was made on Peltigera rufescens on a stone
fence (Alstrup et al. 2004).