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To the observer, this is clearly a grey-coloured Placynthium due to the dense frosting of pruina on the nodular squamules. Currently in Ireland, there are no similar species of Placynthium with this character, so it stands alone. The lichen is always without discs throughout its British and Irish range but collections of such material should be forwarded to the National Botanic Gardens, Glasnevin, for further analysis, as such material is scarce. It is known only from County Antrim.
Original text submitted by Vince J. Giavarini
|Simms, M. J., (2016). Placynthium garovaglii (A.Massal.) Malme. [In] LichenIreland. |
http://www.habitas.org.uk/lichenireland/species.asp?item=19341 Accessed on 2016-09-26.