Notholithocarpus densiflorus

Tanoak, a reference photo
Photo: drizard · CC0 1.0 (licence)

Notholithocarpus densiflorus, commonly known as the tanoak or tanbark-oak, is a broadleaf tree in the family Fagaceae, and the type species of the genus Notholithocarpus. It is a hardwood tree that is native to the far western United States, particularly Oregon and California. It ranges from 15–40 meters (49–131 feet) in height, with a trunk diameter of 60–190 centimeters (24–75 inches). There are a number of radical and incompatible perceptions of tanoak; it has been seen by some as a cash crop and by others as a treasured food plant, while yet others have considered it a "trash tree".

From Wikipedia, under CC BY-SA 4.0.

Is it poisonous?

We have no record of Tanoak 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
Plantae
Phylum
Tracheophyta
Class
Magnoliopsida
Order
Fagales
Family
Fagaceae
Species
Notholithocarpus densiflorus

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