Taphrina populina

The fungus Taphrina populina causes galls to form on the leaves of various poplar species. The galls take the form of raised, blister like leaf bulges on the upper surface and are concave below with bright orange/yellow erect asci.

The galls of the mite Phyllocoptes populi look very similar on the upperside, but are on Aspen and have an erineum underneath.

Unless identified by a recognised expert, a photo of the gall and host plant is required. Photograph upper and underside.   Ensure you have identified and noted the species of host

Widespread in Britain.

Status in Leicestershire and Rutland not known.