Sweet Gum: Liquidambar styraciflua This tree is found as a native tree on the east coast of the United States. It is commonly planted as a domestic tree in cities and towns on the west coast. Its leaves look like those of maples, but the leaves alternate along the stem (maples have opposite leaves).
Domestic Maple (name unknown): Acer species.
Domestic Maple (name unknown): Acer species. Click here to see the lower surface details of this leaf.