The nest-like clusters of twigs so clearly visible on the bare winter branches of the tree are Witches Broom galls.
https://natureinfocus.blog
https://natureinfocus.blog
The nest-like clusters of twigs so clearly visible on the bare winter branches of the tree are Witches Broom galls.
Jessica's Nature Blog 
Is that mistletoe up in the branches?
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Just some unidentified microorganism causing strange things to happen in the tree growth. I have just noticed a tree near my home with something most peculiar going on and producing odd excrescences and twiggery.
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Interesting! This something new to me…something for us to keep an eye out for.
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Witches brooms (or similar) are not uncommon in the UK. I have just discovered some growing in a tree within the small area into which I am still able to wander whilst in lock-down because of the coronavirus.
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