The cones of a spruce tree are also a good way to identify the tree. Cones grow from tree branches and contain the seeds of a tree. Spruces, pines and firs all contain cones, as do other conifers like cedars and hemlock trees. Spruce cones have smooth, thin scales, and are quite flexible and easy to bend. Pine cones have scales that are thick, rough and woody, which makes the cones inflexible.