The term SOURCES OF CONES can be broken down into two four-letter words: FIRS and CONES. FIRS stands for 'Families of the Order Pinales, ' which is a group of coniferous trees that produce cones. These trees are commonly known as evergreens, and they are found in many parts of the world. The cones produced by these trees are used for a variety of purposes, including food, fuel, and construction materials.