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
Rafflesia arnoldii the greatest measurement from a reliable source is for one at Palupah Nature Reserve near Bukittinggi, Sumatra measured by Prof. Syabuddin of Andalas University. "R. arnoldi" weighs up to 11 kilograms (24 lb). These flowers emerge from very large, cabbage-like, maroon or magenta buds typically about wide, but the largest (and the largest flower bud ever recorded) found at Mount Sago, Sumatra in May 1956 was in diameter. It lives as a parasite on several vines of the genus "Tetrastigma", which grow only in primary (undisturbed) rainforests. "Rafflesia" lacks any observable leaves, stems or even roots, yet is still considered