Irish lichens - Caloplaca teicholyta

Order: Teloschistales Family: Teloschistaceae

Species: Caloplaca teicholyta

Growth type crustose, +/- placodioid at margins.
UK photos: On limestone rock.

Scurfy, thick or thin, whitish-grey thallus, closely adpressed, margins +/- placodioid. Centre becoming +/- sorediate. Usually sterile, when present discs are bright orange, sometimes pruinose.
Thallus K-, apothecia K+ purple-red

Found on calcareous rocks, stone, mortar and limestone. Rare in Ireland, scattered records.

Host to the lichenicolous fungus Diplotomma murorum.

Caloplaca teicholyta

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