The porcupine tomato hails from Madagascar, the island nation that brought us the Hellbeast lemur and Dracula ants.
Aside from being sharp and poisonous, the porcupine tomato is a potentially invasive species, since it is difficult to kill, even in drought. Among the features you don't want in a poisonous dagger monster, "hard to kill" has to be way up there.
Did we mention that it spreads quickly, and can reach 8 feet tall by 8 feet wide in a relatively short amount of time? What we're saying is that you should be careful stepping out your front door in the morning, because you never know when a toxic, razor-filled hedge may have sprung up in the middle of the night.