Ilex cookii
 Ilex cookii (Cook's Holly or te) is a species of plant in the Aquifoliaceae family. It is endemic to Puerto Rico. It is threatened by habitat loss. It is a federally listed endangered species of the United States.This tree is only known from a single specimen and a few seedlings in the cloud forests on Cerro de Punta and Monte Jayuya both at Toro Negro State Forest in Puerto Rico. Other specimens were probably destroyed when a communications tower was installed on Cerro de Punta.