Ginny B's picture

Xanthoria parietina

Observed: 16th July 2012 By: Ginny B
S159 Neighbourhood Nature - course complete
Ginny B’s reputation in Fungi and LichensGinny B’s reputation in Fungi and LichensGinny B’s reputation in Fungi and Lichens
Xanthoria parietina

Growing on a granite rock that stands with its base in the sea at high tide; citron-yellow lobes growing sometimes in hollow circles or in crescents shapes. Although I can see no fruiting bodies I think this may be Xanthoria parietina.


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Some fungi are very poisonous so a mistaken ID could have serious consequences.

Species interactions

No interactions present.


Ginny B's picture

Thank you for the correct identification

Thank you for the correct identification. Does this mean that I was also wrong in supposing that the rocky outcrop is granite? Or is it happy growing here because of the type of sand that surrounds the rocks?


AlanS's picture


My first year University geology was a long time ago; whole rock formations must have built up since then. Your rock looks a bit fine grained to me, so maybe it is a metamorphic rock releasing a few more nutrients? But yes, there will be nutrients from sand, sea water, etc., perhaps just enough shell fragments blowing up?


Ginny B's picture

As I've not studied geology

As I've not studied geology at all, you know much more about geology than I do :) I believe this part of NE Scotland is very mixed geologically, which doesn't help me at all! I had thought I could disregard lichens that prefer calcarious substrate when trying to make an identification, but I now think I am wrong.