Pepin likened the tree to cypress, Lombardy poplar and fastigiate oak. It is one of very few trees with a naturally fastigiate form. Also, fastigiate, pendulous, and golden-leaf forms are in cultivation. The cultivar 'Skyline' has been selected for its fastigiate growth. Pepin described the tree as vigorous, with short, slender, erect branches bestowing a fastigiate form. At the centre of the maze is a fastigiate oak with upright branches. Gypsophila fastigiata, the fastigiate gypsophila, is a species of flowering plant of the family Caryophyllaceae. As implied by its name, the tree has a fastigiate, columnar form .