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orange lichen

Scientific Name: Caloplaca vitellinula

Family: Teloschistaceae

Category: Lichen

Growth: Lichenous

Duration:

Other Names:

Xanthoria parietina is a foliose lichen, meaning it has a leafy structure. Its striking color and wide distribution have led to many common names.

This lichen often grows on rocks, concrete, and trees, including near cattle farms where ammonia is present. Pets may encounter it in these environments.

Xanthoria parietina has a wide distribution.
It is commonly found on rocks, concrete, and trees.
Often grows near coastal areas and in environments with alkaline bark.
Observed in locations such as Humboldt Lagoons State Park, California and New Zealand.
Common on the Western Isles, rocks, ground and trees.

Foliose (leafy) lichen.
Forms large, rounded patches up to 10 cm across.
Wide, round-lipped marginal lobes.
Thallus color ranges from yellowish-green to orange, and can appear grey in shaded areas.
Lacks isidia or soredia.
Apothecia (fruiting bodies) are usually present, with a dark orange disc surrounded by a lighter edge.

The orange color of Xanthoria parietina is due to the production of the pigment parietin within the lichen.
Some animals are known for their association with these orange thalli.
Orange lichens may identify hunting perches of birds.

Lichens, including Xanthoria parietina, are dual organisms, formed by a symbiotic association between a fungus and an alga.
The alga, such as Trentepohlia, resides within the hyphae of the fungus.
This symbiotic relationship allows the lichen to survive harsh weather conditions.
Can be prolific in certain environments forming an orange lichen belt.

Pigments from colorful lichens, including orange ones, can be extracted and used to dye wool and other fibers.
Parietin, the orange pigment found in Xanthoria parietina, may have potential as an anti-cancer drug.