• Loxospora elatinum (Ach.) A.Massal.
Loxospora elatinum
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(Map updated: 11 August 2009)

This epiphytic lichen forms grey crusts on old, rough-barked trees spotted with small heaps of paler, blue-grey soralia, these sometimes merging to give bigger patches. The soredia turn bright yellow with a dab of Potassium hydroxide (K). It is also Pd + orange. The blue-grey soralia against the paler grey of the thallus is surprisingly distinctive. Discs are rare. It is usually associated with older, established woodlands and amongst ecologists is highly regarded as a good indicator of habitat stability. Western Ireland; scattered elsewhere.

Key characteristics

  • Pale grey, minutely ‘bubbly’ crust, splashed with heaps of blue-green soredia that are K + bright yellow (a reaction not typical of other bark crusts)
  • • On rough bark (for example, oaks) in old woodlands; Mycoblastus caesius is near to it but never has soredia in ‘heaps’ and is K-.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Loxospora elatinum (Ach.) A.Massal.. [In] LichenIreland. Accessed on 2019-01-20.