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 schadenbergiana Rafflesia schadenbergiana Rafflesia schadenbergiana is a parasitic plant species of the genus "Rafflesia". Known as ""bó-o"" to the Bagobo tribe and ""kolon busaw"" to the Higaonon tribe of Bukidnon, it has the largest flower among the "Rafflesia" species found in the Philippines with a diameter ranging from 52-80 centimeters. It has also the second largest flower in the genus after "R. arnoldii". This species was first collected in the vicinity of Mount Apo, Mindanao during an expedition led by Schadenberg and Koch in 1882. It was not seen for more than a century and was assumed to be extinct until