Pontania triandrae is a sawfly galling Salix triandra. The gall is bean-shaped, starting off green then maturing red. It is smooth and thick-walled, protruding through both the upper and lower leaf surface.
If a gall, it is essential to say which tree species it was on.
The galls are only found on Salix triandra (Almond Willow).
May - September (gall)
Rare but probably under-recorded.
Leicestershire & Rutland Map
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Yellow squares = NBN records (all known data)
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