Species: Ochrolechia parella
Photos: On coastal rocks, Toormore area, Cork, SW Ireland.
Thick, warted, creamy-white or greyish thallus. White prothallus with zoned 'growth-rings' near thickened margins. Very fertile, numerous pinkish apothecia usually with cracked white pruina.
Common both coastal and inland on hard, siliceous rocks.
Can be variable. Cortex K-, C- (or C+ yellow), UV-.
Apothecia C+ red, KC+ red, UV+ white
Ochrolechia parella. Toormore, Co.Cork. January 2009