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This tiny, though abundant, grey-green crustose lichen grows widely on siliceous rocks and walls. It forms very small (0.5-2.0cm diam.) areolate thalli covered with yellow-green to pale brown discs that can coalesce to form larger patches. Common: rocks and walls, also on worked timber in remoter areas and along the coast.
Original text submitted by Vince J. Giavarini
|Simms, M. J., (2016). Lecanora polytropa (Hoffm.) Rabenh.. [In] LichenIreland. |
http://www.habitas.org.uk/lichenireland/species.asp?item=18611 Accessed on 2016-10-26.