Description: Collected only from north Kerry and west Donegal, L. sylvicola can be a difficult species to nail. Look for brown patches of hyphae in cracks below the otherwise blue-grey powdery thallus that test K+ purple-red. The species is known to favour the bark of sessile oak in the semi-natural woodlands of the west. Chemical analysis is required for certain identification.

Key Identification Features:

• Thallus of blue-white or blue-grey powdery granules <0.2mm diam.
• Subthalline hyphae K+ purple red; oak woodland trees.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Lepraria sylvicola at iNaturalist World Species Observations database.