• Gyalecta truncigena (Ach.) Hepp
Gyalecta truncigena
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G. truncigena is the commonest of three species in this family that inhabit the nutrient-rich rain tracks of basic-barked trees. The thin, minutely granular creamy-grey thallus can be packed with vary small (to 0.5mm diam.) orange to pale pink discs with a plump, smooth margin (like a tiny wheel tyre). Under the microscope the spores are colourless and muriform (like the divisions of a stained-glass window) with between 6 and 12 cells. Local. Throughout Ireland.

Key characteristics

  • Tiny, orange to pale-pink coloured fruit gum-like discs on the rain tracks of ash and elm and other basic-barked trees
  • Muriform spores with 6-12 cells [G. flotowii has two to five cells while the darker-fruited G. derivata has septate-spores only].

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Gyalecta truncigena (Ach.) Hepp. [In] LichenIreland. Accessed on 2018-08-15.