Description: A strongly foliose lichen, smooth and blue-grey on top, dark and ciliate (‘hairy’) underneath, and often with powdery soralia on the undulating edges. Common on trees and bushes in rural habitats, and also common on well-lit acid and intermediate rocks especially in coastal habitats.

Key Identification Features:

• Smooth blue-grey colour with marginal soralia.
• Dark ciliate underside.

Original text submitted by Michael J. Simms

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

iNaturalist: Parmotrema perlatum at iNaturalist World Species Observations database.