Description: Very like P. omphalodes (described elsewhere) but is a consistent dark brown colour. Generally, P. discordans is a more slender species with narrower lobes (1-2mm wide) regularly overlapping. Spot test: Medulla K- (P. omphalodes is K+ orange-red). Local in the north and east.

Key Identification Features:

• Almost identical to P. omphalodes but smaller, with narrower, overlapping lobes and an overall dark brown colour
• The medulla (inner white cottony layer) tests K negative.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Parmelia discordans at iNaturalist World Species Observations database.