• Agonimia octospora Coppins & P.James
Agonimia octospora
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This crustose epiphyte is comprised of small, squat, white to grey-green, multi-finger-like squamules (<3 mm long). It grows only on trees (such as oak) where there is known to be a long history of woodland continuity. The smooth, conical to barrel-shaped discs are not uncommon, though through a lens it is the strange squamules which first alert the observer. It has eight spores per spore sac (ascus) and is confined more or less exclusively to south-west Ireland but should be searched for in all known ‘ancient’ woodland.

Key characteristics

  • On very old trees in old woodlands; squamules green, never brown-tinged
  • Agonimia tristicula is similar and may also occur on trees but has bronze-tinted squamules and only one or two spores per ascus.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Agonimia octospora Coppins & P.James. [In] LichenIreland. Accessed on 2018-07-19.