Helvella acetabulum

Vinegar Cup, a reference photo
Photo: This image was created by user Gerhard Koller (Gerhard) at Mushroom Observer, a source for mycological images.You can contact this user here. · CC BY-SA 3.0 (licence)

Helvella acetabulum is a species of fungus in the family Helvellaceae, order Pezizales. This relatively large cup-shaped fungus is characterized by a tan fruit body with prominent branching ribs resembling a cabbage leaf; for this reason it is commonly known as the cabbage leaf Helvella. Other colloquial names include the vinegar cup and the brown ribbed elfin cup.

From Wikipedia, under CC BY-SA 4.0.

Is it poisonous?

We have no record of Vinegar Cup 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
Pezizomycetes
Order
Pezizales
Family
Helvellaceae
Species
Helvella acetabulum

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