For example, in tropical rainforests, most trees have flat, wide leaves. This helps them collect as much sunlight as possible. They also may have funny-looking roots that stick out of the ground. In the temperate rainforest, the trees have much smaller, thinner leaves. These leaves are called needles. The roots of the trees extend deep in the ground. Cone-bearing trees such as firs, pines, and spruces are common in temperate rainforests.