Rosie P's picture

Strange Growth

Observed: 22nd April 2011 By: Rosie P
Arthur's Alien
Arthur's Alien 1

Found in woodland in Dorset - April 2011


No identification made yet.

Species interactions

No interactions present.


Rosie P's picture

Can anyone help me identify

Can anyone help me identify this? Found by a retired farmer who would be fascinated to know what this is or why it has grown?

Chalkie's picture

Some sort of gall?

No idea really - how big is it? From the envelope I'd guess several cm across? Do you know what sort of twig it was on?

Rosie P's picture

I think it was on a hazel and

I think it was on a hazel and about the size of a cricket ball

Sarah West's picture


I would go with it being a plant gall as well. A gall is the plants reaction to an organism such as a parasitic fly, a virus, a bacterium. More information about them can be found on the British Plant Gall Society website

Sarah West
OPAL Community Scientist
Yorkshire and Humber

Rosie P's picture


Thank you for your help with that

petershirley's picture

Gall-like growth on hazel

This seems most likely to be caused by a virus, it's certainly spectacular if it is as big as a cricket ball. Another possibility is that it is a reaction to damage, or to chemicals being used in the vicinity of the plant.

If any more specimens can be collected I would appreciate being sent one to have a look at please.

Peter Shirley