Amur Honeysuckle
Deciduous, upright to spreading shrub that is a member of the Honeysuckle (Caprifoliaceae) family. Can form dense thickets, reduces tree and shrub regeneration, and decreases overall plant diversity.
Autumn Olive
Deciduous shrub or small tree that is a member of the Oleaster (Elaeagnaceae) family. It can invade disturbed areas, out-compete native species, and increases nitrogen levels to the detriment of native communities.
Bell's Honeysuckle
Deciduous upright to spreading shrub that is a member of the Honeysuckle (Caprifoliaceae) family. Hybrid cross between Tatarian and Morrow's honeysuckles. Capable of reducing tree and shrub regeneration and decreases overall plant diversity.
Common Buckthorn
Deciduous, woody shrub to small tree that is a member of the Buckthorn (Rhamnaceae) family. It produces a dense shade that suppresses growth of tree and shrub seedlings, and native herbaceous groundcover.
Glossy Buckthorn
Deciduous shrub or small tree that is a member of the Buckthorn (Rhamnaceae) family. Rapidly forms dense thickets, with a laterally spreading crown and it can resprout vigorously.
Japanese Barberry
Spiny, deciduous shrub that is a member of the Barberry (Berberidaceae) family. It is a common horticultural species and frequently escapes from cultivation.
Morrow's Honeysuckle
Deciduous, upright to spreading shrub that is a member of the Honeysuckle (Caprifoliaceae) family. It forms dense thickets, reduces tree and shrub regeneration, and decreases overall plant diversity.