Rafflesia speciosa is a parasitic plant species of the genus "Rafflesia". Rafflesia is a genus of parasitic flowering plants in the family Rafflesiaceae. Khao Sok National Park is perhaps most famous for the "bua phut" (Rafflesia kerrii) flower. Rafflesia is Antique's provincial flower. These forests contain the Rafflesia, the largest flower in the world. Rafflesia kerrii is a member of the genus "Rafflesia". It belongs to the medium-sized "Rafflesia" (Meijer, 1997). One of the smaller species of Rafflesia, R. pricei, can be found there. For more information, see the review of Philippine "Rafflesia". The area is also notable for harbouring high concentrations of at least three "Rafflesia" species. Rafflesia, the largest flower in the world, can be found in Sibalom Natural Park. The "rafflesia" is also widely found in the country. Both "Rafflesia" and "Amorphophallus" are flowering plants, but they are only distantly related. "Sapria himalayana" and "Balanophora" are root parasites related to "Rafflesia" recorded from the area. For the same reason, the title "corpse flower" is also attributed to the genus "Rafflesia".