• Lecanora carpinea (L.) Vain.
Lecanora carpinea
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(Map updated: 11 August 2009)

Look to find this lichen on tree twigs and small branches, chiefly deciduous trees where it forms small white to grey coloured patches. The very pale brown discs become furred-up with pruina, like an icing-sugar topping on a cake, so appear white from above. A drop of fresh bleach (C) on the end of a toothpick will dissolve the pruina, turning the discs yellow.

Key characteristics

  • White pruinose discs on a white thallus twigs and branches mainly
  • C+ yellow reaction (If C negative, then it is possible the species is Lecanora albella, a lookalike)

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Lecanora carpinea (L.) Vain.. [In] LichenIreland. Accessed on 2019-01-20.