• Placynthiella oligotropha (J.R.Laundon) Coppins & P.James
Placynthiella oligotropha
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(Map updated: 11 August 2009)

This is a mildly calcifuge lichen of heaths and moors where it grows on peaty soils and around tree stumps. The thallus is coarsely granular, brown, becoming yellower when wetted. The brown-black convex discs are often clustered together like piles of miniaturised animal droppings. In Ireland, most modern record from coastal County Mayo.

Key characteristics

  • Forms coarse brown granules (testing C-) over peaty soil surfaces, yellow when wet, but avoids the most acid areas
  • Discs flat to convex (0.20.5mm diam.); in clusters.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Placynthiella oligotropha (J.R.Laundon) Coppins & P.James. [In] LichenIreland. Accessed on 2019-01-16.