Internet info:
Podophyllum peltatum is most commonly known as the mayapple, but in various regions it is also known as Devil's apple, hog apple, Indian apple, umbrella plant, wild lemon, and American mandrake (though it should not be confused with true mandrake, Mandragora officinarum, an unrelated Old World plant whose roots have been used throughout history for medicines and potions).
Also, anything can be a weed if it's growing where it's not wanted.