One of the mysteries of the English language finally explained.
A small conical nail-shaped gall that forms on the leaves of lime trees in response to the presence of mites.
The mite is Eriophyes tiliae, family Eriophyidae
- ‘A fairly common phenomenon associated with lime is that of nail galls, conspicuous protrusions on lime leaves produced by mites.’
- ‘Some galls were noted, including nail gall on lime-tree leaves growing by Low Matlock Lane.’
- ‘In summer, greenfly on the leaves drop sticky honeydew and red nail galls can be seen on the upper leaf surface.’
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