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Fungi or Gall

Posted: Wed May 30, 2018 1:07 pm
by NellyDee
This growth is on a very old beech tree I am not certain if it is fungal or a gall. the large growths I have seen on trees were generally a lot smoother or lined almost taking on the bark look. What is confusing me with this is appears crumbly and as if something (possibly bird) has made it it's nest. I don't suppose you could point me in the right direction?

Re: Fungi or Gall

Posted: Wed May 30, 2018 3:55 pm
by Lancashire Lad
Hi Nelly,

I think this is what is generally known as a "burr". (Americans would call it a "burl").

They are produced as a result of some sort of injury or stress to the tree causing localised & greatly increased cell division, producing these deformed growths.
They can, I believe, be triggered by bacterial or fungal means.


Re: Fungi or Gall

Posted: Fri Jun 01, 2018 10:09 am
by NellyDee
Thank you Mike, informative as ever :)