• Schismatomma quercicola Coppins & P.James
Schismatomma quercicola
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(Map updated: 11 August 2009)

This bark epiphyte is frequent in valley woodlands where it grows alongside old woodland indicators such as Thelotrema lepidinum. It has a grey thallus (scratches orange = Trentepohlia algae) covered in whitish-grey, fleck-like scars that looks as though the tip of a needle has been puncturing the bark. These are the soredia which together with the thallus are K-, PD + orange. On oak and hazel, spreading to other smooth-barked trees. Mostly northern and south-western Ireland.

Key characteristics

  • Whitish-grey fleck-like scars on a pale grey thallus, sometimes forming mosaics with Thelotrema lepadinum and Arthonia cinnabarina. Thallus and soredia Pd+orange
  • Could only be confused with Pertusaria pupillaris which does not scratch orange and is K + dirty red.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Schismatomma quercicola Coppins & P.James. [In] LichenIreland. Accessed on 2020-07-09.