Flowers of plants in the genus Rafflesia (family Rafflesiaceae) emit an odor similar to that of decaying meat. This odor attracts the flies that pollinate the plant. The world’s largest single bloom is R. arnoldii. This rare flower is found in the rainforests of Borneo and Sumatra. It can grow to be 3 feet across and weigh up to 15 pounds. R. arnoldii is a parasitic plant on Tetrastigma vine, which grows only in primary rainforests with no visible leaves, roots, or stem. It does not photosynthesize, but rather uses the host plant to obtain water and nutrients.