Description: Only known from west Donegal this blue-grey to cream-coloured, dust-particle-sized powder lichen grows on rock surfaces sheltered from the rain, or overgrowing mosses when on rock underhangs in woodland. Chemical analysis is required for certain identification; K+ yellowish.

Key Identification Features:

• Very finely powdery (like talcum); thallus grey to cream-coloured, attached to sheltered rock or underhang mosses
• Occurs in woodland up to montane altitudes (t.l.c. necessary for certain id.).

Original text submitted by Vince J. Giavarini

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

iNaturalist: Lepraria atlantica at iNaturalist World Species Observations database.