Description: The thallus of this convoluted sea-shore lichen is blue-grey to lead-grey coloured, Pd+ red. Discs are frequent, brown to black. It colonises hard, siliceous rocks in the orange maritime zone where other lichens such as Lecanora helicopis are concentrated. The one-septate spores have a thick, bloated perispore. In Ireland, there are records from Kerry, Clare, Galway and Donegal.

Key Identification Features:

• Thallus lead-grey, densely folded, Pd+ red; discs black, flattish, with one-septate spores with thick perispore
• Grows with other lichens on the seashore immediately above the black zone.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Halecania ralfsii at iNaturalist World Species Observations database.