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This glamorous, rosette-forming, foliose lichen with a smooth, blue-grey thallus and orange-brown fruits is not hard to identify, as it lacks both isidia and soredia. The minute, finger-like lobes show up well against the dark, hairy, almost black matted underside (hypothallus). It is especially frequent in mature willow swamp and hazel coppice as well as on mature ash trees in the west and south-west of Ireland.
Original text submitted by
Simms, M. J., (2016). Pannaria rubiginosa (Ach.) Bory. [In] LichenIreland. http://www.habitas.org.uk/lichenireland/species.asp?item=18862 Accessed on 2018-04-19. |