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Gold dust lichen

Chrysothrix sp


Chrysothrix is a lichenized genus of fungi in the family Chrysothricaceae.[1] They are commonly called gold dust lichens or sulfur dust lichens,[2]:253 because they are bright yellow to greenish-yellow, sometimes flecked with orange, and composed entirely of powdery soredia.[3] Apothecia are never present in North American specimens.[3] They grow on bark or rocks, generally in shaded habitats.[3] They can sometimes be mistaken for sterile specimens of Chaenotheca, which usually has pinhead apothecia on tiny stalks, or Psilolechia, which usually has small, bright yellow apothecia.


Growing on the North side a of a 12 inch dia. deciduous tree.

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1 Comment

Machi 3 years ago

Doesn't look like any Xanthoria parietina I have ever seen. I don't see any large apothecia present and there are usually many for a lichen this large. Take a look at Chrysothrix maybe

Spotted by

Washington, USA

Spotted on Mar 18, 2017
Submitted on Mar 18, 2017

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