Pothos (Epipremnum aureum)

The undisputed champion of unkillable houseplants. Pothos tolerates low light, irregular watering, and basically any level of neglect short of setting it on fire. It grows trailing vines that can reach 10 feet indoors, purifies air by removing formaldehyde and benzene, and propagates from cuttings in a glass of water. Every college dorm, office cubicle, and bathroom windowsill in America has one for a reason — it refuses to die.