LichenIreland
  • Acarospora rufescens (Ach.) Kremp.
Acarospora rufescens
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(Map updated: 11 August 2009)

Like A. smaragdula (described elsewhere) but with a wide-spreading, smooth, evenly-cracked crust (K-) thinning towards the margin (never lobe-like), of dull or dark brown colour. Discs deeply concave. Look for it on sandstone or other coarse-grained siliceous rocks.

Key characteristics

  • Smooth, dark brown, wide-spreading evenly-cracked thallus (K-)
  • Discs deeply concave; on gritty, acid rock.

Original text submitted by Vince J. Giavarini

 
 Simms, M. J., (2016). Acarospora rufescens (Ach.) Kremp.. [In] LichenIreland.
http://www.habitas.org.uk/lichenireland/species.asp?item=18158 Accessed on 2018-10-19.