While many types of plants contain levels of toxins for defense from insects and other predators, this list of plants are extremely lethal to humans. When foraging for plants to eat in the forest, be sure not to have any of these such as the "Angels Trumpet" on your menu.
What could be sweeter than the sound of an angel’s trumpet? Perhaps the moaning agony of a trip that won’t end. Related to petunias, tomatoes and potatoes, the angel’s trumpet (datura stramonium) is a highly effective hallucinogen, but should not be consumed for recreational purposes as it can also be lethal. According to wikipedia: “The active ingredients are atropine, hyoscyamine and scopolamine which are classified as deliriants, or anticholinergics. Due to the elevated risk of overdose in uninformed users, many hospitalizations, and some deaths, are reported from recreational use.” This common plant also goes by many other names, including jimson weed, stink weed, loco weed, and devil’s snare. One 18-year-old who was house-sitting alone for his uncle recounts how he decided to prepare some angel’s trumpet tea in curiosity and almost died (a friend burst in on him convulsing on the bathroom floor and the authorities assumed he was on an acid trip).