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
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