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Lecanora gangaleoides Nyl.


Thallus generally light grey, warted-areolate, with orange colour in the lower medulla exposed if the surface tissues are picked away (visible at the left of the photograph); apothecia with thick, thalline margins and black discs. Widespread but more common in the north and west and on the coast, on base-poor rocks and stonework. Requires careful distinction from Tephromela atra.

Refs: Smith et al. (2009), 487; Purvis et al. (1992), 306; Dobson (2005), 222-3 (photo); Dobson (2011), 227 (photo); Whelan (2011), 104 (photo); Valcárcel et al. (2003), 212-3 (photo); Puntillo (1996), plate 21 (photo).

Sometimes parasitised and replaced by Diploschistes caesioplumbeus.

 
Lecanora gangaleoides
On rockface, Balmaha, Stirlingshire, November 2008


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© A.J. Silverside
Uploaded November 2008, last updated August 2013