Dieffenbachia seguine, widely known as dumbcane, as well as leopard lily or tuftroot, is a species of Dieffenbachia, a flowering aroid plant of the family Araceae (the arums). It is native to the neotropical realm of the Americas, from extreme southern Mexico and Belize and much of Central America, as well as the northern half of South America (it is typically absent in Argentina, Chile, Paraguay and Uruguay). It is found on many Caribbean islands and territories, including Cuba, Grand Bahama, Grenada, Guadeloupe, Hispaniola, Îles des Saintes, Jamaica, Martinique, Puerto Rico, Saba, Saint Kitts and Trinidad and Tobago. D. seguine is also found on the Galápagos islands of Santa Cruz and San Cristóbal, where it was likely introduced by humans.

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