LichenIreland
  • Parmelia saxatilis (L.) Ach.
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Parmelia saxatilis
© Mike Simms
Parmelia saxatilis
© Mike Simms
Parmelia saxatilis
© Mike Simms
Parmelia saxatilis
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(Map updated: 11 August 2009)
 

In past times this common foliose lichen was the wool-dyer's ‘crottle’. The thallus which forms neat, grey to grey-green rosettes on acid-barked trees and rocks has square-scalloped lobe ends, covered in a net of fine white lines (best seen along the edge of the plant) surmounted by a dense mass of stick-shaped outgrowths (isidia).

Key characteristics

  • Net of white lines over the lobes covered in stick-like outgrowths (isidia)
  • Grey or grey-green coloured lobes with ends slightly burnished or bronzed.

Original text submitted by Vince J. Giavarini

 
 Simms, M. J., (2016). Parmelia saxatilis (L.) Ach.. [In] LichenIreland.
http://www.habitas.org.uk/lichenireland/species.asp?item=18897 Accessed on 2018-12-18.