pf339's picture

White patch on trunk

Observed: 2nd May 2013 By: pf339
S159 Neighbourhood Nature - course complete
pf339’s reputation in Fungi and Lichenspf339’s reputation in Fungi and Lichenspf339’s reputation in Fungi and Lichenspf339’s reputation in Fungi and Lichens
White patch on trunk i
White patch on trunk ii

One of number of white patches growing on trunks of deciduous trees in town park. Possibly Athelia arachnoidea.


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.


pf339's picture

Other observations.

I've returned to have a look at these white patches in Huntingdon several times over past year but had no idea what they might be until I saw the observation of Athelia arachnoidea posted by synangium on 11 May. So thanks for providing pointer and help with identification above.

synan's picture

Glad it solved the mystery

It was Alan, via his website, that brought it my attention when he added the species in March*. If it wasn't so fresh in my mind, I think I would have overlooked it or dismissed it as a mycologist's concern, especially since my find wasn't lichenicolous. So, thanks, in turn, to Alan and, of course, to iSpot.

* new additions are at


AlanS's picture

Nice to know ...

Thanks for the credit, Nigel. It's good to know that the page has proved useful.

When I write a page, I often wonder whether anyone will ever look at it. I am getting around 1000 separate visitors a day now, so some pages must be being looked at, though back when my hosting site gave me useful statistics, most people wanted to look at Parmelia saxatilis.

When I wrote the Athelia page, I suspected that it would be a minority interest!

Not that this will apply to today's addition. I bet my site is crashing right now from all the people who want to look at pictures of Buellia violaceofusca!