Exobasidium japonicum

Alternative names
Azalea leaf gall fungus

The fungus Exobasidium japonicum causes galls on the live leaves of Rhododendron species including azaleas. The galls are irregularly swollen, pale green at first then chalky white.

Identification difficulty

Where Rhododendron species are present.

When to see it

When Rhododendron species are in leaf.

UK Status

Widespread in Britain, though not well recorded.

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