Can you identify this plant? It grows on a single, thick, green stalk, stands six feet tall and has begun to flower into what looks like a trumpet flower. Its leaves are large (12 inches plus) and maple shaped.
Thank you for contacting Toronto Master Gardeners.
This plant is Datura stramonium or Jimsonweed. It is a plant in the nightshade family and is believed to have originated in Mexico. It is a powerful hallucinogen and deliriant and was used ethnographically for the intense visions it produces. However, the tropane alkaloids responsible for both the hallucinogenic properties are fatally toxic in only slightly higher amounts than the medicinal dosage and careless use can result in hospitalization or even death.
This plant can be considered weedy or invasive. It is an annual but seeds itself easily.