• Lecania naegelii (Hepp) Diederich & Van den Boom
Lecania naegelii
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Except in the very exposed parts of Ireland, virtually all free-standing ash trees will support this tiny crustose lichen on their twigs. The grey-green thallus forms scattered and often, small, isolated colonies among other twig species with discs that are variable blue-grey or darker, or of a half-and-half grey-white colouration. It often occurs with Lecania cyrtella and Caloplaca cerinella. It is widespread on basic and nutrient-rich trees and shrubs but is at present severely under-recorded.

Key characteristics

  • It is not readily identified with the naked eye but through a hand lens it is easy to spot among the other twig lichens
  • The tiny, grubby, grey-blue or grey-white discs (to 0.7mm diam.) should be enough to confirm its presence.

Original text submitted by Simon Davey

 Simms, M. J., (2016). Lecania naegelii (Hepp) Diederich & Van den Boom. [In] LichenIreland. Accessed on 2018-07-17.