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Invasive Species: Shrubs
Restricted in Michigan
Autumn olive is a deciduous shrub that can grow to 20 feet high. Its leaves are bright green on top and distinctively silver underneath. Spring-blooming cream or yellow flowers have a strong fragrance and abundant red berries are lightly speckled and easily seen in the fall. The flowers bloom in August and September in Michigan.
Prohibited in Michigan
Japanese knotweed is a perennial shrub that can grow from 3 - 10 feet high. It has hollow stalks that are persistent through the winter and look similar to bamboo. The stems have a fine white coating that rubs off easily. The flowers are arranged in spikes near the end of the stems that are small, numerous and creamy white in color. Flowers bloom in August and September in Michigan.