Philodendron bipinnatifidum, synonyms including Thaumatophyllum bipinnatifidum and Philodendron selloanum, (common names: split-leaf philodendron, lacy tree philodendron, selloum, horsehead philodendron, guaimbé) is a plant in the genus Philodendron, in the family Araceae. The species is native to South America, namely to Brazil, Bolivia, Argentina, and Paraguay, but is also cultivated as a landscape plant in tropical, subtropical and warm temperate climates.

The common name "split-leaf philodendron" is also used for Monstera deliciosa.