description Aspicilia calcarea Overview
Aspicilia calcarea is a crustose lichen in the family Hymeneliaceae that grows directly on hard calcareous rock. Its thallus is commonly chalky white to pale blue-grey, with a smooth or cracked-areolate surface and radial cracking toward the margins. Black or initially grey-pruinose apothecia are immersed in the areoles. The species is recorded on limestone and other alkaline rock in Europe, including Britain.
help Aspicilia calcarea FAQ
What kind of lichen is Aspicilia calcarea?
Aspicilia calcarea is a crustose lichen in the family Hymeneliaceae. It grows directly on hard calcareous rock such as limestone and forms a closely attached thallus.
What does Aspicilia calcarea look like?
Its thallus is commonly chalky white to pale blue-grey. The surface may be smooth or divided into cracked areoles, with radial cracking toward the margins.
Where should someone look for Aspicilia calcarea?
Look on exposed limestone or other calcium-rich rock rather than on tree bark or soil. Its close crust-like growth makes it easy to mistake for a mineral mark on the stone.
What color are the fruiting structures of Aspicilia calcarea?
The lichen has dark fruiting structures that may be black or initially grey-pruinose. The pale thallus and contrasting dark discs are useful features when examining it on calcareous rock.
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