Spotted water hemlock (Cicuta maculata)

Spotted Water Hemlock (Cicuta maculata) is distinct from the poison hemlock (Conium maculatum) that famously killed Socrates. Despite this, spotted water hemlock remains one of the deadliest plants to humans. It contains a toxin called cicutoxin, which can lead to severe symptoms such as convulsions, nausea, abdominal pain, vomiting, seizures, and delirium.