Caloplaca albolutescens Teloschistaceae
Caloplaca albolutescens

Growth type crustose
Chemical results: Thallus K-, apothecia K+ crimson

Often a pioneer species on weakly acidic concrete, cement and brick walls and on church buildings.

A thin pale grey or whitish-grey thallus that often appears mottled and has scattered grey soredia. Apothecia can be numerous, initially immersed then sessile, discs orange or brownish-orange. Spores polarilocular, 14-18 x 8-10 Ám, septum 1/4 to 1/5 spore length. Micrographs below.

Similar: C. teicholyta. Thicker thallus with lobed margins and rarely fertile


Caloplaca albolutescens

Caloplaca albolutescens

Microscope photographs
Caloplaca albolutescens

Caloplaca albolutescens
Caloplaca albolutescens
Wimborne Minster, Dorset. February 2017

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