Gum Ball is a compact form of the species Liquidambar styraciflua, the American Sweet Gum tree.
The main attraction is the autumn colours of the large maple-like leaves. If space is limited this is perhaps the best way to bring the spectacular autumn colours of the New England fall to your garden.
The tree also produces small green flowers in the spring, which are followed by small woody fruit capsules.
We usually have Gum Ball available as a "top-worked" tree, with a lollipop style branched head on top of a length of clear stem, to emphasis the ornamental qualities of this variety. It should not get much bigger than 2m or so.