Irish lichens

Clauzadea immersa
Order: Lecanorales       Family: Porpidiaceae

Species: Clauzadea immersa

Growth type crustose.
Photos: On limestone. Teampall Chronain, the Burren, Ireland.
BLS Burren meeting 2009

White to pale-grey thallus, the deeply immersed blackish-brown apothecia often with a pale-grey pruina and leaving pits in the rock when they fall out. A black prothallus is sometimes present. Spores are simple, 10-15(-19) (6-)7-8(-9) m, warted when mature. Pycnidia frequent.
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

Clauzadea immersa

Clauzadea immersa
Clauzadea immersa. BLS Burren meeting, April 2009

Please contact me if you find errors. All images used are copyright.