Simplify the following text for a Grade 11 native English-speaking person.
Original: Rafflesiaceae is a family of flowering plants in the Malpighiales order , are parasitic plants found in east and southeast Asia , including Rafflesia arnoldii , the plant with the largest flower of all plants .
Simplified: Rafflesiaceae is a family of parasitic plants found in east and southeast Asia , including Rafflesia arnoldii , the plant with the largest flower of all plants .