Beware: 7 Deadliest Plants on Earth - Page 6 of 9

Cicuta Douglasii

Known to be grown in wet places, this ordinary looking plant can kill a living being within fifteen minutes. They contain a toxin called cicutoxin that is stored in its stems. Circuta Douglasii is the most poisonous plant found in North America. Even a small portion of it can be very lethal and dangerous. They also are one of the best animal killers as they attract animals with their small and soft structure.