• Miriquidica leucophaea (Rabenh.) Hertel & Rambold
Miriquidica leucophaea
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(Map updated: 11 August 2009)

This upland, crustose lichen of exposed, siliceous rocks is a common enough species. However, for beginners there are few distinctive features which can help ‘nail it’ in the field. The grey to brown, slightly shiny, much divided and broken (areolate) thallus has one important feature: the fact that it is often a pastiche of warted and flat areoles. It is rare to find it as one or another — but now to the discs: these are numerous but unevenly distributed, a mixture of convex and flat forms (to 1mm diam.), usually black (on north-facing rocks they often lack pigmentation and may be pale brown or chestnut and rather shiny like fruit gums). Spot tests negative. Northern and south-west Ireland.

Key characteristics

  • Spot tests negative; grey-brown, flat and warted thallus, minutely divided
  • Discs black or shiny brown to 1mm diam. not much larger than the areoles; simple spores.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Miriquidica leucophaea (Rabenh.) Hertel & Rambold. [In] LichenIreland. Accessed on 2020-07-03.