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This is a lichen of coastal, siliceous rock cliff crevices where it is tolerant of some nutrient enrichment. At inland sites, the undersides of sheltered rock overhangs are favoured. The thallus is greyish-brown to black, sometimes with a tinge of mauve. The closely aggregated discs – slightly raised in shaded situations – have a thick rim (exciple). All reactions are negative. Spores are on the large side (to 23µm long). In Ireland, the species is known from a few localities, for example, the Glenderlough mica-schist, County Wicklow.
Original text submitted by Vince J. Giavarini
Simms, M. J., (2016). Rinodina orculariopsis H.Mayrhofer. [In] LichenIreland. http://www.habitas.org.uk/lichenireland/species.asp?item=39782 Accessed on 2018-04-20. |