Witches' brooms on a Hornbeam tree, Carpinus betulus, growing in Ashwellthorpe Wood, an ancient woodland in Norfolk UK, photographed in April. Witches

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Witches' brooms on a Hornbeam tree, Carpinus betulus, growing in Ashwellthorpe Wood, an ancient woodland in Norfolk UK, photographed in April. Witches' brooms are galls, consisting of a mass of small twigs arising, here, from infection by the Ascomycete fungus Taphrina carpini. The reproductive structures of the fungus (asci ) are produced in spring as the twigs of the witches' broom come into leaf. These leaves are stunted in growth and do not persist, and the presence of the infection does not seriously affect the growth or reproduction of the tree itself

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Size: 3468px × 5212px
Photo credit: © DR JEREMY BURGESS/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ancient, asci, ascomycete, ashwellthorpe, betulus, biological, biology, botanical, botany, broom, carpini, carpinus, gall, hornbeam, taphrina, witches, wood, woodland