Amandinea devilliersiana

About

Amandinea devilliersiana is a crustose lichen in the family Caliciaceae. It occurs on salt-sprayed granite and quartzite along the coasts of South Australia, Western Australia, and Tasmania, where its grey, fissured thallus is dotted with inconspicuous black fruit bodies. This coastal specialist can be identified by its distinctive red reaction when tested with potassium hydroxide solution and its production of norstictic acid. The lichen shares its harsh maritime habitat with other salt-tolerant species, preferring slightly sheltered rock faces and overhangs where seawater mist provides intermittent moisture.

Summary from Wikipedia