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 tuan-mudae In July 2008, one of the largest flowers measuring 95 cm was recorded in the park. This is probably the one measured and photographed by Dr. D. L. Nickrent of Southern Illinois University at this location. Some taxonomists consider R. tuan-mudae and R. arnoldi to be subspecies of the same taxon. Rafflesia tuan-mudae Rafflesia tuan-mudae is a member of the Rafflesiaceae family. It lives as a parasite on the "Tetrastigma" vine. The enormous flowers may reach up to 1 m in diameter. The buds normally emerge where the vine is growing along the ground, unlike some of the other "Rafflesia"