Lichens on a tree. Two types of lichen growing on a tree trunk.

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lace lichen from Moore Creek Park, Saint Helena, CA, US on April 1, 2020 at 10:11 AM by Deborah

Near the high tide line on a massive old stump. The white one is probably Lacanora xylophila (wood lover). Guessing that the bright orange ones may be a Candelariella species. In Explore 21 August 2014.