These extraterrestrial plants resemble twisted tree trunks clustered with bulbous blossoms holds up a gaping mouth ready to swallow a victim whole. A fully-grown moonflower easily stands 20 feet tall, its massive trunk frequently 4 feet or more in diameter. The roots extend away from the base and into the soil, making the plant seem well anchored, but the roots themselves possess an agility that belies the great size of the plant and allows the moonflower to uproot itself and move with surprising speed. The tendrils of the plant are independently prehensile and writhe around the large flytraplike ï¿1/2headï¿1/2 that crowns the stem.