• Aspicilia intermutans (Nyl.) Arnold
Aspicilia intermutans
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(Map updated: 11 August 2009)

A. intermutans has affinities with two other species A. cinerea and A. epiglypta all of which react K+ red; Pd+ orange. A. epiglypta has irregular-shaped discs and A. cinerea usually one-two discs per areole compared with two-three discs per areole in A. intermutans. For certainty, material needs to be collected during the winter months when the conidia can be extracted from tiny dots on the surface of the thallus. Examination of the length of the conidia will allow certain identification of the species. It occurs on low-lying siliceous rocks. In Ireland: Connemara, County Galway.

Key characteristics

  • Microscopic measurements of the conidia equal 7-11ųm long
  • Usually two to three discs per areole.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Aspicilia intermutans (Nyl.) Arnold. [In] LichenIreland. Accessed on 2020-07-14.