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(Map updated: 11 August 2009)

This lichen is identical in almost every respect to the common calcicole species P. nigrum. It is distinguished under the microscope by the three- to five-septate, fusiform, worm-like spores. It has a montane limestone habitat. In Ireland, the species is very rare.

Key characteristics

• Spores three- to five-septate (one- to three-septate in P. nigrum)
• Montane habitat.

NBN Atlas mapping: Species account : NBN Atlas UK Species Observations database

iNaturalist: Species account : iNaturalist World Species Observations database

Original text submitted by Vince J. Giavarini