Rattlesnake Plant (Cephalotus harrisii) - This plant is not just venomous, it will also ruin your favorite hiking trail
Autumnal Dead Nettle (Buddleja asiatica) - Will make you itch like crazy, also ruins your picnic
Autumn Leaves of Doom (Rheum austrinum) - Causes spontaneous, uncontrollable weeping and existential dread
Killer Blooms (Carnations of Despair) - Will turn your favorite flowers into deadly traps
Don't say we didn't warn you