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 whilst waiting for the British Museum to produce a better-prepared version. The generic name "Rafflesia", given in honour of Raffles and proposed by Brown, who had originally wanted to call it "Arnoldii" after Arnold, was validated by S. F. Gray in his report of the June 1820 meeting of the Linnean Society of London, as published in the "Annals of Philosophy" in September that year. The species "Rafflesia arnoldii" was officially described for the first time in 1821 by Brown, so that Arnold was commemorated after all. The flower of "Rafflesia arnoldii" grows to a diameter of around , but