Page author: Crow Vecchio
Caloplaca citrina

Distribution: West of Cascades crest in Washington; Oregon, California, midwest and central states, Maine to South Carolina; British Columbia, Alberta, Quebec, disjunct in Northwest Territories.

Habitat: Widely distributed.

Substrate: Rock of all kinds, wood and soil.

Conservation Status: Not of concern


Thallus, egg-yolk yellow to dark yellow-orange; Areoles granular, becoming a leprose crust; Apothecia rare, but may be abundant in some specimens.

Accepted Name:
Caloplaca citrina (Hoffm.) Th. Fr.

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Caloplaca citrina in the Consortium of Pacific Northwest Herbaria database.

CalPhotos: Caloplaca citrina photos.

USDA Plants: Caloplaca citrina information.

0 photographs:
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