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Witches' broom on Prunus
Observed: 6th January 2012 By: RHoman
Added: 7th January 2012
Large, dense twiggy masses on a Prunus species (Plum or Damson). The small rucksack gives a sense of scale. One of the masses has fallen from the tree and in the 2nd picture the size of the relatively thin branch on which the gall has formed can be seen.