Order: Lecanorales       Family: Lecanoraceae Species: Lecanora helicopis Growth type crustose. Photos: On maritime rocks, Co. Waterford and Co.Cork, Ireland Identified by John Douglass Very variable. Thallus grey to brownish-grey, slightly warted or smooth and cracked, prothallus dark bluish-grey or whitish. Dark brown apothecia with margins becoming darker and excluded. Coastal, found on shaded siliceous rocks above HWM. Chemical reactions negative. Occasionally host to the lichenicolous Arthonia varians, which is usually found on Lecanora rupicola

Lecanora helicopis. January and April 2012