Plants have evolved all sorts of wickedly clever defence mechanisms, and the most primal—and effective—are thorns, prickles, and spines. They are designed to keep animals away, and as shade in very hot climates. While problematic for maintenance and pruning, when it comes to your personal home security, these masters of pain handily defend your property. As a bonus, most of these thorny plants trick themselves out with delicate blossoms and colourful berries.
Plant toxins are naturally occurring phytochemicals formed by plants to protect themselves against various threats like bacteria, fungi, insects, and predators. Toxins can be present in commonly consumed human foods like fruits and vegetables. The casava tuber, a staple diet in many countries contains cyanide and can kill you if not prepared properly. The monkey orange in Kwazulu-Natal contains strychnine when raw, and will definitely make you feel unwell.
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