pf339's picture

Limestone lichens

Observed: 28th August 2012 By: pf339
S159 Neighbourhood Nature - course complete
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Limestone lichens 1
Limestone lichens 2

Clusters of light tan-pink squamules with frilly white edges growing in recesses in a limestone outcrop (along with other lichens and mosses in some cases). Possibly Psora decipiens.


Caution: Do NOT use iSpot to identify fungi to eat!

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

Species interactions

No interactions present.


synan's picture


Overgrowing Placynthium nigrum perhaps?


AlanS's picture


I was going to say the same thing.


pf339's picture


There was another even more crowded area on a nearby outcrop with Dermatocarpon miniatum joining what looked like possibly Psora decipiens and Placynthium nigrum.
Looking at a picture of this other spot again I wonder now if it is Toninia verrucarioides at this other place and not Psora decipiens overgrowing the Placynthium nigrum. Shall post an image of this under possible identification of Toninia verrucarioides.

AlanS's picture

Yes, why not?

Toninia verrucarioides is much smaller and more set into the Placynthium, but it is a distinctive thing.

I am planning a Toninia update to my website sometime very soon if I don't get buried by admin at work, and this will include T. verrucarioides from Sutherland.


AlanS's picture

I see

that in fact you have already posted the T. verrucarioides, and indeed it is correct.