Cerbera odollam, a plant that grows in India and southeast Asia, is also known as the "suicide tree" because people munch it to kill themselves. Apparently, it's also used to rub out young wives who aren't well-liked by their in-laws. From New Scientist:
Although the kernels of the tree have a bitter taste, this can be disguised if they are crushed and mixed with spicy food. They contain a potent heart toxin called cerberin, similar in structure to digoxin, found in the foxglove.
Digoxin kills by blocking calcium ion channels in heart muscles, which disrupts the heartbeat. But while foxglove poisoning is well known to western toxicologists, (researcher Yvan) Gaillard says pathologists would not be able to identify Cerbera poisoning unless there is evidence the victim had eaten the plant. "It is the perfect murder," he says.
