A sport of the `Hetz Wintergreen` cultivar of Thuja Occidentalis tree (commonly known as arborvitae) called "American Pillar". It is nearly twice as dense in its branching habit as the `Hetz Wintergreen`. It also has a brighter green coloring in the winter. Its increased foliage density makes possible better wind, sight and sound screening with a narrow evergreen hedge. It is reproduced by rootings cut from a parent stock of `American Pillar`.