"Mellyrn are trees of immense size, especially when growing in Númenor. They are also described as similar to beeches: their bark was smooth and silver-grey, and the leaves were green on top and silver underneath; they turned golden in autumn and remained on the tree through the winter to fall to cover the ground in the spring, when new leaves sprouted. Golden flowers bloomed on the branches." —Mallorn on tolkiengateway.net