• Species that are not native and also have the potential to harm human health or to harm natural, agricultural or silvicultural resources can be listed as prohibited or restricted by the State of Michigan. If a species is prohibited or restricted, it is unlawful to possess, introduce, import, sell or offer that species for sale as a live organism, except under certain circumstances.

  • Black locust leaves Black Locust

    (Robinia pseudoacacia)

    Black locust is a fast-growing tree that can reach 40-100 feet high. It has compound leaves and produces clusters of white flowers in the spring. 

  • Tree of heaven Tree of Heaven

    (Ailanthus altissima)

    Tree of Heaven is a fast-growing, deciduous tree reaching up to 70 feet. Its leaves resemble native sumac, but its fruits are flat, twisted, winged seeds.  Tree of Heaven's flowers and leaves have an unpleasant odor, somewhat like rotten peanut butter.