Oak - Northern RedThe Northern Red Oak has branches and upper trunk are marked with long, light grey longitudinal lines which remind some people of ski trails. Open grown trees form a rounded crown which makes a nice shade, park or street tree. Many communities use Red Oak as a street tree where overhead space is not limiting. Acorns are small and easily cleaned up, broken into small pieces by pedestrians or eaten by squirrels. The foliage turns a wonderful dark red in