Very variable and, when lobes are flat, can resemble Hypotrachyna laevigata, but the latter is larger and has repeatedly-branched rhizines beneath.

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.

On acid-barked trees and heather (Calluna) stems, also terrestrial on base-poor dunes.

All year round.

Throughout Britain and often very common.

Occasional in Leicestershire and Rutland.