Orange Wall Lichen Caloplaca citrina

Identification
This lichen has bright orange crust with tiny discs.

Location
Common statewide

Size
One inch crusts

Diet
It absorbs nutrients from air and rain.

Habitat
It occurs in urban and rural areas.

Activity Period
Year round

Behavior
It grows on stone and bark. It persists through winter.

Lifecycle
Reproduction occurs through spores.

Population
The population is stable statewide.

History
It has long been widespread in Ohio.

Human Interactions
It often grows on old buildings.

Facts
Its pigments protect it from sunlight.

Sources
ODNR academic sources

Airborne nutrients moisture | Walls rocks bark | Statewide