Datura stramonium, known commonly as Jimsonweed ... It should go without saying, but you should not be knowingly ingesting Jimson weed, and if you have, seek medical attention.
Jimson weed or burundanga is also known as Datura stramonium. The plant can reach a height of 5 feet. It bears white or purple flowers and has prickly seed pods that split open at maturity.