Irish lichens

Caloplaca lactea

Order: Teloschistales       Family: Teloschistaceae

Species: Caloplaca lactea

Growth type crustose.
UK photographs. Identified by Brian Coppins

Thin white or inconconspicuous thallus without a distinct prothallus. Apothecia are plane or concave when young, sometimes leaving shallow pits in substrate. Discs bright orange-yellow becoming paler and translucent when wet. Margins are swollen and sometimes elevated. Spores with narrow septum.
Thallus K-, apothecia K+ red-purple.

Pioneer species on dry limestone fragments, also found on sea shells and pebbles. Infrequently recorded in Ireland, most records are from the Burren, Co. Clare.


Caloplaca lactea


Caloplaca lactea
Caloplaca lactea February 2010

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