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,
Borneo lowland rain forest environment for approximately 10,000 species of plant (more than in the whole continent of Africa). Among these are some 2,000 orchids and 3,000 trees, including 267 [Dipterocarpaceae] tropical rainforest trees, of which 155 are endemic to Borneo. This makes the island the center of the world's diversity for dipterocarps. Plants include five species of the strong-smelling parasite [Rafflesia], one of which, "Rafflesia arnoldii", has flowers over a metre wide, making it the world's largest flower. The limestone uplands of the [Sangkulirang Peninsula] and Sarawak support their own particular plant communities, as do the [Labi Hills] on the Brunei-Sarawak border. The