Rafflesia, a group of plants, native to the East Indies, that are parasitic on the roots or stems of vines. The most common species bears the largest flower of any known plant. It often reaches a length of 18 inches (45 cm) across and a weight of 15 pounds (6.8 kg). The flower is globe-shaped with five wide, fleshy lobes and is the only portion of the plant visible. The remainder is below ground. The flowers usually have a bad odor, which attracts flies and beetles that then pollinate the flowers. The plants are named for Sir Thomas Stamford Raffles, who discovered them about 1820.

Rafflesia arnoldii is the most common species. The family is Rafflesiaceae.