Japanese Maple Tree
I have seen a Japanese maple tree that is approx. 5 feet tall. The leaves are the larger, not lacey type. The tree has about 5 to 6 biforcations. Half the tree is green, half the tree is purple. Its color is evenly split in half. Does anyone know the name of this tree?
Most Japanese maples are grafted varieties, since growing them from seed is challenging. Since that's the case, you can't ever be sure that the result of a graft will look the same as the parent plants or that it will look exactly as what was hoped for. It sounds like the tree you saw may be a grafted cultivar, and if that's the case, it would be difficult to identify what variety the parent plant(s) were.
You can read more about grafting Japanese Maples at https://www.gardeningknowhow.com/ornamental/trees/japanese-maple/japanese-maple-grafting.htm