1. Nerium Oleander
Probably the most poisonous plant on Earth, every part of this plant is full of toxins. Two of the most powerful ones are oleandrin and neriine.
2. Cicuta or Water Hemlock
Found mainly in the marshy areas of the American continent, this plant contains a deadly toxin- cicutoxin- which is concentrated mainly in the roots.
3. Abrus Precatorius or Rosary Pea
Possessing beautiful fruits, the rosary pea contains black and red seeds. Used extensively in making imported jewelry, they are popular as rosary prayer beads.
4. Atropa Belladonna or Deadly Nightshade
Probably the plant with the scariest name, the deadly nightshade grows to a height of 1.5 meters and can be recognized by the dull, dark green leaves, and bell-shaped purple flowers.
5. Castor Oil Plant
Castor plant originated in Africa and is now found worldwide. It bears yellowish green flowers with a red center.
6. Taxus Baccata or the English Yew
Given the abundance in church graveyards across Great Britain, no doubt the English yew stands a deserving candidate on the list.
7. Ageratina Altissima ot White Snakeroot
Credited with killing Abraham Lincoln's mother, the white snakeroot is a shade-loving weed that grows in the eastern and southern United States and contains high levels of trementol, a dangerous toxin.
8. Aconitum or Aconite
One of the most beautiful poisonous plants, aconite, contains blue, white, or flesh-colored bunches of flowers at the top of the stalks.
9. Datura Stramonium aka Jimsonweed
With its pointed fruits and leaves, jimsonweed has truly created a scary image for itself. The plant has been long related to spiritual and voodoo properties due to its hallucinogenic properties.
10. Hippomane Mancinella or Machineel
Manchineel derives its name from manzanilla (little apple) due to the resemblance of its fruit and leaves to that of an apple.