• Ramalina polymorpha (Lilj.) Ach.
Ramalina polymorpha
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(Map updated: 11 August 2009)

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 characteristics

  • 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

 Simms, M. J., (2016). Ramalina polymorpha (Lilj.) Ach.. [In] LichenIreland. Accessed on 2019-03-25.