• Leprocaulon microscopicum (Vill.) Gams ex D.Hawksw.
Leprocaulon microscopicum
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(Map updated: 11 August 2009)

This small, blue-green, low-growing species with clustered stalks of powdery granules as its main thallus — often barely 4mm tall — closely resembles a stalked member of the ‘power lichen’ genus Lepraria. It grows on dry, sheltered, usually consolidated, often sloping sandy substrata, in cliff faces and low walls. It will occupy low, dry corners of old sandstone buildings. Spot tests are negative. Throughout Ireland, except in the north-west.

Key characteristics

  • Thallus of blue-green powdery granules but stalked and fragile, to a few millimetrers high only
  • At the base of dry, rather unstable, sandy cliffs and sandstone walls.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Leprocaulon microscopicum (Vill.) Gams ex D.Hawksw.. [In] LichenIreland. Accessed on 2020-08-05.