• Byssoloma leucoblepharum (Nyl.) Vain.
Byssoloma leucoblepharum
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This tiny rarity and crustose lichen, is a mainly tropical species. In temperate areas it grows mainly on old heather (and probably gorse) stems and the bark of ancient woodland trees. The orange-brown to dark brown discs have a fluffy or a woolly edge (exciple) that spreads outwards like a web against a thin grey thallus. In Ireland, there is a single record from Clonmacnois, County Offaly.

Key characteristics

  • Forms tiny, grey spreading patches on old, straggly heather stems and old forest trees
  • Discs are two-tone, orange-brown (never black) with a grey, woolly exciple which spreads outwards, web-like.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Byssoloma leucoblepharum (Nyl.) Vain.. [In] LichenIreland. Accessed on 2018-07-19.