A superb picture of a Rafflesia pricei flower on its host, a Tetrastigma vine. The Rafflesias do not develop any leaves, just the inflorescence and flower. There are 10-15 species of Rafflesia in all, found in SE Asia. The largest species of them all is Rafflesia arnoldi which can achieve a diameter of 1m. It it the largest flower in the world.