Rafflesia arnoldii are obligate parasites of plants known for having very large flowers, even the largest flower in the world. He grew up in the network vines (lianas) Tetrastigma and has no leaves and is unable to photosynthesize. This plant endemic to Sumatra island, especially the southern part (Bengkulu, Jambi and South Sumatra). Kerinci Seblat National Park is the main conservation area of this species. This species, together with the other members of the genus Rafflesia, threatened status due to massive deforestation. In Java patma grow only one type of parasite, Rafflesia patma.
Flowers are the parasites are not rooted, not leafy, and is not stemmed. While blooming flower diameter can reach 1 meter weighing about 11 kilograms. Flowers sucking inorganic and organic elements of the host plant Tetrastigma. The only part that can be called as "plant" is a network that grows on vines Tetrastigma. Flowers have five petals that surround the part that looks like the mouth of a barrel. At the bottom there's an interest such as barbed dish, containing the stamen or pistil flowers depending on gender, male or female. Animal pollinators are flies attracted by the stench of interest incurred. Interest only lived for about one week (5-7 days) and then wither and die. Very small percentage of fertilization, because the male flowers and female flowers are very rarely able to bloom together in a single week, if any flies that came to fertilize.