Description: This crustose lichen has a white to pale grey thallus with neat, convex, marginal lobes. It can become covered in soredia a shade darker than the thallus. It is a familiar rosette-forming species in sheltered habitats exposed to nutrient-rich dust. Older specimens often lose their centres, especially on steep, vertical walls and on churchyard headstones. Black discs occur, but are usually uncommon. Frequent on nutrient-rich trees, old buildings and monuments.

Key Identification Features:

• Uniformly robust and pale grey throughout
• Soredia frequent; old crusts can loose their centres.

Original text submitted by Vince J. Giavarini

Distribution Map from NBN: Diploicia canescens at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Diploicia canescens at iNaturalist World Species Observations database.