Rafflesia

Rafflesia is a genus of parasitic flowering plants native to the rainforests of Southeast Asia, most famously represented by a species that produces the single largest individual flower of any plant in the world, sometimes exceeding a metre across and weighing up to around ten kilograms. The plant has no leaves, stems or roots of its own visible outside its host, instead living almost entirely as thread-like tissue inside the vines of a specific host plant, from which it draws all its water and nutrients, emerging only briefly to produce its enormous flower. Rafflesia flowers are famous for emitting a strong odor resembling rotting meat, which attracts carrion flies that serve as its primary pollinators. Because Rafflesia depends on a specific host vine and rainforest conditions, deforestation across its range has made most known species rare and threatened with extinction.