• Caloplaca teicholyta (Ach.) J.Steiner
Caloplaca teicholyta
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This lichen grows on calcareous stone, mostly on buildings where it forms mealy-granular, pale grey, rounded patches (almost rosettes) that are sorediate at the centre. The edge of the thallus is formed of a continuous ring of rounded lobe tips. Discs are rare but, when present, are a glorious bright orange. C. albolutescens differs in the thinner, leprose thallus with scattered soredia and the non-lobate margin. In Britain this species appears to replace C. teicholyta in the north. In Ireland there are a few, very scattered records.

Key characteristics

  • Forms thick, white-grey, mealy patches with soredia centrally concentrated; the edges are ringed with lobes; usually without discs
  • On calcareous building stone (limestone and mortar), walls and monuments.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Caloplaca teicholyta (Ach.) J.Steiner. [In] LichenIreland. Accessed on 2018-08-21.