Description: This is one of our more unusual species of Ramalina growing mostly on heavily nutrient-enriched stone below seabird colonies or never far inland. The strap-shaped thallus of prostrate, radiating tufts is reminiscent of some tree-dwelling species, but the surface of the lobes is rough and stringy, cracking to reveal small pseudocyphellae, bearing clusters of granular isidia.

Key Identification Features:

• Thallus dark green to grey, prostrate, the radiating clumps often joining up with others to form colonies
• Lobes roughened with stringy splits and pseudocyphellae, this latter producing granular isidia.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Ramalina polymorpha at iNaturalist World Species Observations database.