• Xylographa vitiligo (Ach.) J.R.Laundon
Xylographa vitiligo
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Most usually found without discs (which are elliptical, slit-shaped), X. vitiligo grows chiefly on untreated wooden railings and rotting tree stumps around coniferous plantations where it can be seen as a sprinkling of blue-grey soralia which turn K+ yellow, PD+ orange. It is most easily confused with Buellia griseovirens which often occurs with it, but is K+ yellow-red, PD+ yellow. Throughout Ireland.

Key characteristics

  • Speckling of blue-grey soralia on tree stumps of old conifers and on old fence posts and railings
  • It is K+ yellow, PD+ orange (K+ yellow to red in Buellia griseovirens).

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Xylographa vitiligo (Ach.) J.R.Laundon. [In] LichenIreland. Accessed on 2018-08-20.