Crumpled Rock Tarpaper Lichen

Lathagrium fuscovirens, the crumpled rock jelly, is a species of lichen-forming fungus in the family Collemataceae. It forms dark olive-green to blackish, leaf-like growths up to 5 cm across that have a jelly-like texture when wet. Small bead-like propagules called isidia are often abundant on its surface. The species grows on hard limestone and similar calcareous rock, and is found across much of Europe, parts of North America including eastern Canada and the western and eastern United States, and in Africa and western Asia. It was first described in 1776 from material collected near Oxford.

From Wikipedia, under CC BY-SA 4.0.

Is it poisonous?

We have no record of Crumpled Rock Tarpaper 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

• Collema flaccidum
• Lathagrium cristatum
• Lathagrium auriforme
• Collema subflaccidum
• Collema furfuraceum
• Leptogium acadiense

Classification

Kingdom

Fungi

Phylum

Ascomycota

Class

Lecanoromycetes

Order

Peltigerales

Family

Collemataceae

Genus

Lathagrium

Species

Lathagrium fuscovirens

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