• Phaeographis lyellii (Sm.) Zahlbr.
Phaeographis lyellii
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(Map updated: 11 August 2009)

This is a striking lichen of smooth bark; it does best in old, damp woodlands. In good condition it can be immediately told by olive green colour of the thallus and by the white powdery rim raised prominently around the flat, black discs arranged like an ancient black tribal script outlined in white chalk. In Ireland, this species is most often recorded from those counties furthest south.

Key characteristics

  • Olive thallus on smooth bark, for example, holly, hazel; discs black with a white powdery rim
  • Specimens with the colour washed out can be identified by the five-septate spores, 2435m long.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Phaeographis lyellii (Sm.) Zahlbr.. [In] LichenIreland. Accessed on 2019-01-20.