• Calicium abietinum Pers.
Calicium abietinum
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This ‘pinhead lichen’ has no visible thallus; it boasts non-pruinose discs and large spores (11.5–15µm long) with a minutely warted surface. C. abietinum should be searched for on old oaks, old tree stumps and wood. The stalks are not entirely black; they tend to include a green or brown pigmentation. In Ireland, it is known from Counties Cork, Tyrone and Wicklow.

Key characteristics

  • Thallus inapparent, stalk with green or brown colouration; discs non-pruinose with large finely warted spores
  • Old tree stumps, dead wood, standing oaks.

Original text submitted by

 Simms, M. J., (2016). Calicium abietinum Pers.. [In] LichenIreland. Accessed on 2018-08-15.