The American Corpse Flower, which you might only see once in a lifetime.

The Chinese name for "尸花" is "Titan Arum Flower." In English, it is called "Titan Arum," also known as "Corpse Flower" or "Stinky Plant." It is located in a botanical garden in San Marino, California. Since this flower emits a nauseating odor similar to that of decaying flesh when it fully blooms, it gets its name. According to records, the "Corpse Flower" is native to the tropical rainforests of Sumatra.

Source: http://www.foryn.cn