Amur corktree is dioecious, meaning some plants produce only female flowers and some produce only male flowers. Fruits will only form on female plants. The drupes are about the size of a blueberry, turning black when mature in fall. They have a disagreeable odor when bruised and can stain sidewalks and other surfaces. Male clones are preferred for use in the landscape to avoid this and to avoid seedling growth.
Karren Wcisel, TreeTopics.com
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Phellodendron amurense, Amur corktree, tree, deciduous