• Verrucaria murina Leight.
Verrucaria murina
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This is one of the smaller species of this genus. It grows in a range of habitats: fragments of limestone, pieces of brick, on or about neglected or overgrown ground and sometimes abundantly on stones in shady woodlands, often by streams. The small thin, fingernail-sized thallus is usually accompanied by rather conspicuous spherical discs (perithecia) with average-sized spores (1824m long). Throughout Ireland.

Key characteristics

  • Thallus thin, green to brown, forming tiny patches usually on small stones; perithecia large 0.120.8mm diam.
  • On various substrata, especially small stones in woodland.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Verrucaria murina Leight.. [In] LichenIreland. Accessed on 2018-08-20.