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 tuan-mudae In July 2008, one of the largest flowers measuring 95 cm was recorded in the park. This is probably the one measured and photographed by Dr. D. L. Nickrent of Southern Illinois University at this location. Some taxonomists consider R. tuan-mudae and R. arnoldi to be subspecies of the same taxon. Rafflesia tuan-mudae Rafflesia tuan-mudae is a member of the Rafflesiaceae family. It lives as a parasite on the "Tetrastigma" vine. The enormous flowers may reach up to 1 m in diameter. The buds normally emerge where the vine is growing along the ground, unlike some of the other "Rafflesia"