Description: This epiphyte is found only in exposed woodlands of high-rainfall areas where it grows on the leached bark of pine, oak and birch. At first glace it could be mistaken for P. multipuncta or Thelotrema petractoides but in this species all the chemical reactions are negative, the thallus colour is uniformly grey and the edge of the narrow discs irregularly toothed. In Ireland, the species is known from Killarney, County Kerry.

Key Identification Features:

• Thallus grey and smooth, the grey soralia forming a ring around the discs (warts) like in P. multipuncta (which has white soralia) but without obscuring it
• On leached acid bark in high-rainfall areas.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Lepra ophthalmiza at iNaturalist World Species Observations database.