• Halecania ralfsii (Salwey) M.Mayrhofer
Halecania ralfsii
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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 characteristics

  • 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

 Simms, M. J., (2016). Halecania ralfsii (Salwey) M.Mayrhofer. [In] LichenIreland. Accessed on 2018-08-14.