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(Map updated: 11 August 2009)

This bark lichen is akin to L. chlarotera (described elsewhere) in most of its outward characteristics, other than the fact that there are no granules in the epithecium of the disc. It can also be told by the black prothallus protruding at the edges. Discs are as in L. chlarotera though many are piebald. Probably much overlooked. In Ireland, there are a few scattered records.

Key characteristics

• This species has a black prothallus showing as a line around the edge of the thallus
• Like L. chlarotera but with some piebald discs and an absence of granules in the epithecium.

Original text submitted by Vince J. Giavarini