• Verrucaria maura Wahlenb.
Verrucaria maura
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Forms extensive black, finely-cracked crusts with abundant tiny warts (perithecia). Often extends well above HWM on rough coasts. The dominant lichen of the littoral 'Black Zone'. Frequently mistaken for spilt oil.

Key characteristics

  • Extensive black, warted and finely cracked crusts
  • Exclusively marine; dominant lichen of the 'Black Zone'.

Original text submitted by Michael Simms

 Simms, M. J., (2016). Verrucaria maura Wahlenb.. [In] LichenIreland. Accessed on 2018-08-15.