The Split Leaf Philodendron also called a Monstera deliciosa, is a large popular easy- care houseplant that is not really a philodendron at all. There is a great deal of confusion about what to call this plant because the various names have become inter-changeable; other names include: Windowleaf Plant, Ceriman, and Mexican Breadfruit Plant. Whatever we call it, these plants are native to the jungles of Mexico, Panama, and India, have big glossy heart- shaped leaves that, as the plant matures, split from the leaf edge to the center vein. These slits in the leaves are called cuts. A Split Leaf Philodendron grows rapidly and often has leaves that are up to 3ft. long and 2ft. wide.