Irish lichens

Caloplaca citrina
Order: Teloschistales       Family: Teloschistaceae

Species: Caloplaca citrina sens lat.

Growth type crustose
Photos: On coastal rocks. Snave, Cork, SW Ireland.

Yellow to greenish-yellow or orange thallus comprised of minute, sometimes lobed, granules covered by orange soredia. Yellowish-orange apothecia with sorediate paler margin. Very variable.
K+ crimson / purple.

Very common on walls, mortar and calcareous rocks, also sometimes found on bark, moss and soil.

Similar: Caloplaca flavocitrina

Caloplaca citrina

Caloplaca citrina
Caloplaca citrina. Snave, Co.Cork. September 2009

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