Four new species of Philodendron Schott (Araceae) from Caquetá Department in Colombia are published: P. agudeloi Croat, Edwin Trujillo & T. Mines, P. arevaloi Croat, P. crystallum Croat & Edwin Trujillo, and P. dalyi Croat. All are members of subgenus Philodendron: P. agudeloi is in section Macrobelium (Schott) Sakur. subsect. Macrobelium (Schott) Engl.; P. arevaloi is in section Philodendron subsect. Philodendron; P. crystallum is in section Macrobelium subsect. Glossophyllum (Schott) Croat ser. Ovata Croat; and P. dalyi is in section Macrobelium subsect. Glossophyllum ser. Glossophyllum Croat. [ABSTRACT FROM AUTHOR]