Lecidea tessellata

Tile Lichen, a reference photo
Photo: Jason Hollinger · CC BY 2.0 (licence)

Lecidea tessellata (tile lichen) is a species of saxicolous (rock-dwelling), crustose lichen in the family Lecideaceae. It was formally described as a species in 1819 by German botanist Heinrich Flörke.

From Wikipedia, under CC BY-SA 4.0.

Is it poisonous?

We have no record of Tile Lichen 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.

Easily confused with

Classification

Kingdom
Fungi
Phylum
Ascomycota
Class
Lecanoromycetes
Order
Lecideales
Family
Lecideaceae
Genus
Lecidea
Species
Lecidea tessellata

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