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Caloplaca adnexa, Caloplaca alcarum, and Caloplaca stanfordensis: Orange Lichens

This page provides information about several species of lichen, particularly those known as orange lichens. These include Caloplaca adnexa, Caloplaca alcarum, and Caloplaca stanfordensis.

Considerations for Pets

• Lichens, including orange lichens, often grow on rocks and other outdoor surfaces.

Considerations for Children

• Lichens, including orange lichens, often grow on rocks and other outdoor surfaces.

Common Names

• Common Orange Lichen: Used to describe Xanthoria parietina and possibly other species.
• Stanford Orange Lichen: A common name for Caloplaca stanfordensis.
• Schaerer's Orange Lichen: Another common name for Caloplaca stanfordensis.

Distribution and Habitat

• Caloplaca stanfordensis is found in the USA and Canada.
• Lichens, including orange lichens, are commonly found on rocks and boulders.

Morphological Characteristics

• Xanthoria parietina is described as a foliose, or leafy, lichen.
• Orange lichens are known for their bright orange color.
• Some lichens form crusts that appear Dorito-orange or chartreuse in color.
• Some orange lichens feature orange apothecia (fruiting bodies).

Quirky Facts

• Some animals are attracted to the "splendid splashes of orange thalli" produced by orange lichens.
• Lace lichen has become a state symbol (presumably of California).

Interactions with Other Organisms

• Lichens are a symbiotic partnership between a fungus and algae.
• Some insects, such as Hemileuca magnifica, have coloration that mimics orange lichens.

Further Information

• Stanford University Libraries: An online search tool for books, media, and journals.
• Stanford Health Care: Offers health-related information.
• HighWire Press, Stanford University: Hosts online jnals and publications.
• California Lichen Society: A resource for information about lichens in California.