Oak apple
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An oak apple is a mutation of an oak leaf caused by chemicals injected by the larvae of certain kinds of gall wasp. They are so called because the gall, which can measure up to 5cm in diameter but is normally only around 2cm, looks a little like an apple.
European oak apples are caused by the Biorhiza pallida gall wasp and American oak apples by Amphibolips confluenta. [1]
Oak apples may be brownish or reddish.
[edit] Notes
- ^ Oxford English Dictionary
[edit] See also
[edit] External links
- Amphibolips confluenta
- Biorhiza pallida
- Gloucestershire Naturalists' Society photograph of galls with 'red apple' appearance See also:[1]
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