Rafflesia hasseltii (common name Cendawan Muca Rimau meaning "Tiger-faced Mushroom". Although Rafflesias have mycelia-like fibers penetrating their host, they are Dicots and not mushrooms.) is a parasitic plant species of the genus Rafflesia and the family Rafflesiaceae which is hosted by certain Tetrastigma species. It can be found in Kerinci Seblat National Park, Sumatra, Indonesia. R. hasseltii has by far the widest variation in form, color and pattern of any of the Rafflesias.

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