LichenIreland
  • Leproplaca xantholyta (Nyl.) Harm.
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Leproplaca xantholyta
© Mike Simms
Leproplaca xantholyta
© Mike Simms
Leproplaca xantholyta
© Mike Simms
Leproplaca xantholyta
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(Map updated: 11 August 2009)
Leproplaca xantholyta
© Mike Simms
 

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.

Key characteristics

  • Thallus mustard yellow, of powdery granules above a white medulla
  • Edges clearly lobed; K+ purple, on hard, shaded limestone.

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 2018-10-20.