Common Rosette Lichen Physcia millegrana
Identification
This lichen has pale gray rosettes with powdery edges.
Location
Common statewide
Size
One to three inch rosettes
Diet
It absorbs nutrients from air and rain.
Habitat
It occurs in forests and urban areas.
Activity Period
Year round
Behavior
It grows on bark and wooden structures. It persists through winter.
Lifecycle
Reproduction occurs through soredia.
Population
The population is stable statewide.
History
It has long been present in Ohio.
Human Interactions
It is harmless and widespread.
Facts
It thrives in moderately polluted areas.
Sources
ODNR NatureServe
Airborne nutrients moisture | Tree bark fences rocks | Statewide