LichenIreland
  • Pertusaria albescens (Huds.) M.Choisy & Werner
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Pertusaria albescens
© Robert Thompson
Pertusaria albescens
© Mike Simms
Pertusaria albescens
© Mike Simms
Pertusaria albescens
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(Map updated: 11 August 2009)
 

This crustose lichen has a slightly thicker and more wrinkly-uneven, grey, edge-zoned thallus than its look-a-like, P. amara, and white granular soredia that frequently coalesce into large, lumpier clumps. If a taste-test is carried out it will prove negative. Mature sheltered trees, frequent.

Key characteristics

  • Scattered lumpy-white soredia on a grey thallus
  • Taste-test for oxalic acid negative (see P. amara).

Original text submitted by Vince J. Giavarini

 
 Simms, M. J., (2016). Pertusaria albescens (Huds.) M.Choisy & Werner. [In] LichenIreland.
http://www.habitas.org.uk/lichenireland/species.asp?item=19375 Accessed on 2018-10-18.