Cup plant

Silphium perfoliatum, the cup plant or cup-plant, is a species of flowering plant in the family Asteraceae, native to eastern and central North America. It is an erect herbaceous perennial with triangular toothed leaves, and daisy-like yellow composite flower heads in summer.

From Wikipedia, under CC BY-SA 4.0.

Is it poisonous?

We have no record of Cup plant 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

Asterales

Family

Asteraceae

Genus

Silphium

Species

Silphium perfoliatum

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