th4957's picture

Crustose lichen

Observed: 7th December 2011 By: th4957
S159 Neighbourhood Nature - current student
th4957’s reputation in Fungi and Lichensth4957’s reputation in Fungi and Lichens

found on an old stone wall in woodland in northern snowdonia


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.


th4957's picture

Hi Alan thanks for your ID

Hi Alan
thanks for your ID (and of the many others)!
we have several disused iron/lead mine workings around here - would that influence the types of lichen found ?(as in would the iron in the substrate encourage the L. lithophila to develope?)
many thanks

AlanS's picture


A substantial number of lichens, including many rarities show preference or requirement for old mine sites - especially lead and other non-ferrous metals.

It is in fact a major problem for lichenology that tidying of such sites, including old spoil heaps, is causing significant losses of species.

Lecidea lithophila is not so fussy - it seems simply to require base-poor rocks, but it shows a much greater tendency than most accompanying species to deposit iron-oxide on its surface. I don't think it has an extra iron requirement, nor can the orange colour itself be considered diagnostic. Quite a number of lichens can develop patchy, orange, iron-oxide-discolouration, apart from those that are always yellow or orange.


th4957's picture

Hi Alan thanks so much for

Hi Alan
thanks so much for the info