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Order: Lecanorales
Family: Porpidiaceae
Species: Clauzadea immersa Photos: On limestone. Teampall Chronain, the Burren, Ireland. BLS Burren meeting 2009 White to pale-grey thallus. Deeply immersed blackish-brown apothecia often with pale-grey pruina. Pits in rock are left when apothecia fall out. A black prothallus is sometimes present. Thallus chemical reactions negative, hymenium I+ pale blue. Found throughout Ireland, can be locally frequent on hard, well-lit limestone and also occurs on church memorials. |
Clauzadea immersa. BLS Burren meeting, April 2009