• Lepraria lesdainii (Hue) R.C.Harris
Lepraria lesdainii
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This powder lichen is a characteristic feature of shady crevices in old walls, stone bridges and ruined buildings that have had their mortar courses weathered over time. The apple-green colour and fluffy, cottony texture of the thallus is diagnostic. It is widespread in Ireland.

Key characteristics

  • The colour, texture and confinement to shaded calcareous habitats indicate this species
  • Most weathered mortar courses on the shaded side of old walls should support it. It is usually one of the first ticks in a lichen beginnerís notebook.

Original text submitted by Simon Davey

 Simms, M. J., (2016). Lepraria lesdainii (Hue) R.C.Harris. [In] LichenIreland. Accessed on 2018-07-20.