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

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