Rafflesia Park where the flowers are numbered and monitored by the park rangers. "Rafflesia" are also remarkable for showing a large horizontal transfer of genes from their host plants. This is well known among bacteria, but not higher organisms. The name "corpse flower" applied to "Rafflesia" can be confusing because this common name also refers to the titan arum ("Amorphophallus titanum") of the family Araceae. Moreover, because "Amorphophallus" has the world's largest unbranched inflorescence, it is sometimes mistakenly credited as having the world's largest flower. Both "Rafflesia" and "Amorphophallus" are flowering plants, but they are only distantly related. "Rafflesia arnoldii" has
Mount Kinabalu whose flower grows to in diameter), though it should be noted that blooms of the flower are rare and difficult to find. Meanwhile, another "Rafflesia" species, "Rafflesia tengku-adlinii", can be found on the neighbouring Mount Trus Madi and the nearby Maliau Basin. Its incredible biodiversity in plant life is due to a combination of several unique factors: its setting in one of the richest plant regions of the world (the tropical biogeographical region known as western Malesia which comprises the island of Sumatra, the Malay Peninsula, and the island of Borneo), the fact that the mountain covers a wide climatic