Teloschistaceae Caloplaca teicholyta Growth type crustose, margins +/- placodioid Chemical results: Thallus K-, C-. Apothecia K+ crimson Found on calcareous stones and mortar, usually on buildings, walls and church monuments. Host to the lichenicolous Diplotomma murorum. Thick or thin, whitish-grey thallus, margins +/- placodioid. Forms rounded patches, centre +/- sorediate and scurfy, lobe ends forming +/- complete zone round the edge. Rarely fertile, apothecia initially inate, orange-brown. Spores are 14-18 x 8-10 um, type 1C. Similar: C. albolutescens; lobed margins, Lecanora pruinosa; C+ orange.

Caloplaca teicholyta
Corfe Mullen and Kimmeridge, Dorset. January and March 2014