Smooth Rock Tripe (Umbilicaria mammulata)

Smooth Rock Tripe, a reference photo — Photo: Jason Hollinger · CC BY 2.0 (licence)

Umbilicaria mammulata, or smooth rock tripe, is a foliose lichen found on boulders and rock walls. It is one of the largest known lichens, typically growing to a size of 4 to 15 cm (1.6 to 5.9 in).

From Wikipedia, under CC BY-SA 4.0.

Is it poisonous?

We have no record of Smooth Rock Tripe being toxic, poisonous or venomous. That is not proof that it is safe. Never eat, touch or handle a wild plant, mushroom or animal on the strength of an identification; ask someone qualified.

Classification

Kingdom: Fungi
Phylum: Ascomycota
Class: Lecanoromycetes
Order: Umbilicariales
Family: Umbilicariaceae
Genus: Umbilicaria
Species: Umbilicaria mammulata

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