Purple Robe (Robinia pseudoacacia 'Purple Robe')

Hardy and fast growing to 40 or 50′, this Black Locust is a sight to see in the spring. zone 4

Lacy Lady (Robinia pseudoacacia 'Lacy Lady')

This contorted dwarf black locust is a picturesque addition to a garden; the amazing twisting branches will spread out as far as it will grow tall (15′). It produces no flowers, but the curly leaves make up for it. zone 3