Description: 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 Identification Features:

• 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

Distribution Map from NBN: Xylographa vitiligo at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Xylographa vitiligo at iNaturalist World Species Observations database.