• Calicium diploellum Nyl.
Calicium diploellum
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As a rule, the ‘pin’ lichen Calicium species are relatively uncommon in Ireland. This is one of Ireland’s rarities, a minute species with yellow frosting (pruina) around the disc which is supported by a golf-tee-like stalk two-tenths of a millimetre tall. Its headquarters is Killarney where it grows on holly but there is also a second locality for it in County Fermanagh.

Key characteristics

  • ‘Pin’ lichen with tiny stem and yellow pruina fringing the disc
  • On holly in oceanic woodland.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Calicium diploellum Nyl.. [In] LichenIreland. Accessed on 2018-07-18.