6. Deadly Nightshade – Death Comes In Slow Footsteps
It belongs to the family of vegetables like potato and tomato. The plant is highly poisonous and even a single leaf can be poisonous enough to cause death for adults. The toxins in this plant attack the nervous system and a few fruits are enough to kill a person. Poisoning symptoms include dilated pupils, dry mouth, convulsions, fast heartbeats, blurred vision, and coma. However, the effects are not prompt and it takes a few hours for the toxin to work.