Astrophytum ornatum

Star cactus, a reference photo
Photo: User:Chrizz · Public domain

Astrophytum ornatum, the bishop's cap or monk's hood cactus, is a flowering plant of the family Cactaceae, endemic to the Central Plateau of Mexico. It is the largest and tallest species of Astrophytum.

From Wikipedia, under CC BY-SA 4.0.

Is it poisonous?

We have no record of Star cactus 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
Plantae
Phylum
Tracheophyta
Class
Magnoliopsida
Order
Caryophyllales
Family
Cactaceae
Species
Astrophytum ornatum

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More species

Star cactus (Astrophytum ornatum) · B.inomen