Andricus glandulae


The agamous generation of the cynipid gall wasp Andricus glandulae galls the axillary leaf bud of various Oak species.  The bud is transformed into a pear shaped gall about half a cm high and often coloured red. The gall has a cover of long, white or violet, adpressed hairs that are directed downwards. It is mainly seen on young shoots.

Identification difficulty

Adult Gall

Recording advice

Adult: Unless identified by a recognised expert, a photo is required and the specimen should be examined with a microscope. In the comments box, state the key or ID method used and describe the size and identifying characters.


Where the host Oak species are present.

When to see it

Galls may be encountered in late summer and early autumn.

UK Status

True status in Britain is difficult to determine due to lack of records.

VC55 Status

Status in Leicestershire and Rutland not known.

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Leicestershire & Rutland Map


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map