• Candelaria concolor (Dicks.) Stein [8]
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Candelaria concolor
© Mike Simms
Candelaria concolor
© Mike Simms
Candelaria concolor
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This spreading species is currently blazing a trail across Ireland and turning wayside trees in our towns and cities yellow. The minutely foliose thallus with fan-like lobules that are sorediate can interlock to produce overlapping tiers that spread to form extensive colonies. Discs are common, orange-yellow with a paler margin. It is already well established in Ireland in suitable habitats.

Key characteristics

  • The minute lobes of delicate design appear to interlock as they grow. Unlike similar yellow coloured lichens (for example, Xanthoria species) this species is K-
  • A rapid coloniser and possible indicator of the spread of global warming.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Candelaria concolor (Dicks.) Stein [8]. [In] LichenIreland. Accessed on 2018-07-21.