Rafflesia arnoldii which then pollinate the rare plant. It is not to be confused with the titan arum, "Amorphophallus titanum", which is also commonly referred to as the "corpse flower" because of its repulsive odor. "Rafflesia arnoldii" is rare and fairly hard to locate. It is especially difficult to locate the flower in forests, as the buds take many months to develop and the flower lasts for just a few days. The flowers are unisexual and thus proximity of male and female flowers is vital for successful pollination. These factors make successful pollination a rare event. When "Rafflesia" is ready to reproduce,
Rafflesia arnoldii the greatest measurement from a reliable source is for one at Palupah Nature Reserve near Bukittinggi, Sumatra measured by Prof. Syabuddin of Andalas University. "R. arnoldi" weighs up to 11 kilograms (24 lb). These flowers emerge from very large, cabbage-like, maroon or magenta buds typically about wide, but the largest (and the largest flower bud ever recorded) found at Mount Sago, Sumatra in May 1956 was in diameter. It lives as a parasite on several vines of the genus "Tetrastigma", which grow only in primary (undisturbed) rainforests. "Rafflesia" lacks any observable leaves, stems or even roots, yet is still considered