• Hypotrachyna laevigata (Sm.) Hale
Hypotrachyna laevigata
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This large, elegant, loosely attached, grey to very pale blue foliose species with long, flat, narrow lobes, has an uncracked thallus and neat, powdery soralia on the lobe ends. The white medulla (scratch away some of the outer layer to expose) is C+ orange. It grows on acid-barked tree species (oak, birch, holly, alder) in hilly parts of Ireland but is especially frequent along the west coast.

Key characteristics

  • The similar Hypotrachyna taylorensis has neither soredia nor isidia; it is also characterised by a pale yellow medulla
  • Hypotrachyna revoluta lacks the narrow lobes, it is sorediate, and has more rounded, revolute lobes; it is C+ red rather than orange.

Original text submitted by Simon Davey

 Simms, M. J., (2016). Hypotrachyna laevigata (Sm.) Hale. [In] LichenIreland. Accessed on 2018-08-16.