Fir cones are the reproductive structures of fir trees, which belong to the Pinaceae family. These cones come in various sizes and shapes, typically elongated and cylindrical. They play a crucial role in the tree's life cycle by producing seeds that can grow into new trees. The cones are usually green when young and turn brown as they mature. They open up to release seeds when conditions are right, often aided by wind. Fir cones can be found on the ground beneath the trees or still attached to the branches, showcasing the tree's reproductive success.