LichenIreland
  • Lecanora muralis (Schreb.) Rabenh.
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Lecanora muralis
© Mike Simms
Lecanora muralis
© Mike Simms
Lecanora muralis
© Mike Simms
Lecanora muralis
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(Map updated: 11 August 2009)
Lecanora muralis
© Mike Simms
 

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This lichen is most common in urban areas on the grit-tiles of nutrient-enriched roofs of bungalow-style houses and the like and on other man-made substrata, such as concrete, asbestos-cement, asphalt and walls. The yellow-green to green-grey thallus can be rosette-like when young, but more often forms coalescing crusts with lobed margins tightly packed with pale brown discs with wavy edges. It is an attractive species in its own right especially when growing singly. It is widely distributed and expected to spread.

Key characteristics

  • There are very few lichens like it. The tightly adpressed thallus, yellow-green colour, rosette-like form, overlapping lobes and pale brown convex discs should be sufficient
  • Man-made habitats such as roof tiles (not slates) and concrete particularly attract it.

Original text submitted by Simon Davey

 Simms, M. J., (2016). Lecanora muralis (Schreb.) Rabenh.. [In] LichenIreland.
http://www.habitas.org.uk/lichenireland/species.asp?item=18604 Accessed on 2017-10-24.