The Suicide Plant: Gympie-Gympie
f you are not a very keen explorer, the Gympie-Gympie will appeal to you just like any ordinary berry brush. It has wide leaves that usually have a deep green hue.
The Sweet Slayer: Oleander (Nerium Oleander)
Every inch of the Oleander spells trouble. Even a tiny percentage of any of its parts is enough to kill an animal that ingests it.
The Most Poisonous Plant: Castor Oil Plant (Ricinus communis)
For something medically beneficial, the Castor bean holds a dark side. They are an effective treatment for wounds and have laxative properties.