Order: Lecanorales Family: Lecanoraceae
Species: Lecanora antiqua (L. conferta)
Photos: Macroom protestant church, Co. Cork, SW Ireland.
Variable, thallus absent or thick and areolate, warted or smooth, whitish or creamy-grey. Crowded apothecia, very pruinose, discs cream-brown to brown, initially with thick, sometimes crenulate margins.
Usually found on mortared church walls, also occurs on vertical surfaces of basic rocks.
Thallus: K-, C+ yellow-orange, KC+ yellow-orange, P-, UV+ bright pink. Discs: C+ yellow-orange, UV+ bright pink.
Lecanora antiqua (L. conferta). Protestant church, Macroom, Co. Cork. August 2009