• Miriquidica pycnocarpa f. pycnocarpa (Korb.) Andreev
Miriquidica pycnocarpa f. pycnocarpa
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(Map updated: 11 August 2009)

This crustose lichen should be searched for on granitic rocks where the scurfy grey thallus on a black prothallus produces discs (<0.4mm diam.) quite unlike those of other lichens growing on rock. In fact, it is a black carbuncle of discs, arranged in a deflated blackberry-like configuration. The thallus, if spot tested, reacts K+ yellow, Pd + faintly yellow. In Ireland: recorded from Counties Kerry, Waterford, Sligo, Mayo and Leitrim.

Key characteristics

  • Thallus poorly developed, scurfy grey, prothallus black; discs black, arranged into unmistakable clusters
  • On granitic rocks; uncommon.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Miriquidica pycnocarpa f. pycnocarpa (Korb.) Andreev. [In] LichenIreland. Accessed on 2020-08-05.