• Polyblastia efflorescens Coppins
Polyblastia efflorescens
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(Map updated: 11 August 2009)

Currently Ireland’s (and Britain’s) sole sorediate member of the genus, look out for it below overhangs and in sheltered outcrops of calcareous schistose-like rock. The crustose, pale grey-green thallus is composed of scattered areoles which dissolve almost entirely into coarse, ± stalked soralia (bright green when moist) which can often hide the spherical discs from view. The colourless, muriform spores (8/ascus) can attain a length of 50µm; the discs are protected by a well-developed involucrellum. In Ireland, it is very rare in north Donegal.

Key characteristics

  • Only sorediate Polyblastia; soredia sometimes stalked
  • Spores colourless; 8/ascus, to 50µm long.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Polyblastia efflorescens Coppins. [In] LichenIreland. Accessed on 2019-08-25.