This unmistakable, mustard-yellow ‘powder lichen’ of shaded, hard limestone underhangs and crevices can be told by its colour, lobe-like margins and spot tests. It can form thalli many centimetres wide or smaller fragments of a few millimetres or so where it is starting to become established. A white medulla may be seen where the surface is broken. Reactions: K+ purple. Northern half of Ireland, much rarer in the south.
Original text submitted by Vince J. Giavarini
Simms, M. J., (2016). Leproplaca xantholyta (Nyl.) Harm.. [In] LichenIreland. http://www.habitas.org.uk/lichenireland/species.asp?item=20571 Accessed on 2019-12-10. |