Invasive Shrub Species

These courses represent key species which pose a significant threat to natural resources. Completing these training courses will provide you with the knowledge to identify and report these important threats.

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.

Black Jetbead

Open, arching shrub that is a member of the Rose (Rosaceae) family but its leaves are opposite, rather than alternate.

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.

European Privet

Bushy, stout, shrub that is a member of the Olive (Oleaceae) family. It was historically widely planted but now less utilized and is vulnerable to anthracnose twig blight.

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.

Multiflora Rose

Deciduous, dense, perennial shrub that is a member of the Rose (Rosaceae) family. It was introduced from Japan and Korea in the 1800s and later promoted to control soil erosion, as a living fence and for wildlife food and cover.