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|Species: Umbilicaria mammulata|
Giant rocktripe is between 2-5" wide and brown in color. Their underside is black. They are disk-like with folded and rippled sides. They are a leathery texture and are smooth and hard when dry. They have small hairs on the underside.
Habitat & Range
These lichen are found through the Northeastern US and Southeastern Canada. They live on rocks and boulders in open forests.
Giant rocktripe can be found year-round and are photosynthetic.
Featured image by James Dake.