LichenIreland
  • Porpidia flavicunda (Ach.) Gowan
Porpidia flavicunda
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Look for this species on siliceous rocks in the uplands. P. flavicunda is one of only two recognised species of Porpidia with a naturally occurring orange thallus, though many Porpidia species have surfaces which oxidise (rust) to orange or red, so can be confusing. P. flavicunda is only known for definite from County Kerry but can be told by its thick thallus (without K+ crimson pigment) with clustered discs surrounded by a black prothallus, and chemistry of confluentic acid.

Key characteristics

  • Thallus yellow-orange (without K+ crimson pigment) and defined by its black prothallus
  • Confluentic acid present.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Porpidia flavicunda (Ach.) Gowan. [In] LichenIreland.
http://www.habitas.org.uk/lichenireland/species.asp?item=39721 Accessed on 2017-10-20.