Caloplaca holocarpa


Thallus greyish to yellow or orange but usually poorly developed or almost absent, often as rather amorphous material just around the apothecia, soredia absent; apothecia dispersed to somewhat crowded, of mixed sizes, orange-yellow to deeper orange, thalline exciple scarcely developed but 'proper' margin relatively thick and conspicuous when young, much less visible as the apothecia mature and become convex.


On sandstone and other siliceous rocks, on walls and on concrete.

When to see it

All year round.

UK Status

Widespread and generally common.

VC55 Status

Fairly frequent in Leicestershire and Rutland.

Leicestershire & Rutland Map

UK Map