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 verrucosa the plant. "Rafflesia verrucosa" has very distinctive raised warts on its perigone lobes and diaphragm. The warts are non-uniform in shape or size. The warts extend to the diaphragm rim of the plant; this characteristic is unique to "R. verrucosa", while all other "Rafflesia" species lack warts on their diaphragms. Another unique characteristic of "R. verrucosa" is the anastomosing plate-like processes on the plants disk. The hair like ramenta are longer (7 mm) when compared to other small "Rafflesia". Compared to other smaller-sized "Rafflesia", the anther number of "R. verrucosa" is much greater (20-21). The anthers size and disk size