Autumn olive

Autumn Olive (Photo by James H. Miller, USDA Forest Service, www.invasive.org)

Updated: May 4, 2023

Resources for information about common invasive trees and shrubs in Maryland and the mid-Atlantic region.

General Resources

Northeastern Invasive Plants Directory - USDA Forest Service

Invasive Species - University of Maryland's Home and Garden Information Center

Maryland Invasive and Exotic Species - Maryland Department of Natural Resources

Noxious Weeds in Maryland - Maryland Department of Agriculture

Invasive Species (Common Name - Alphabetical Order)

Autumn olive

Autumn Olive

Invasives in Your Woodland: Autumn Olive (Branching Out, Vol. 26, no. 2 - Summer 2018)

USDA Forest Service

Maryland Invasive Species Council

Bull Thistle in bloom

Bull Thistle

USDA Forest Service

Maryland Invasive Species Council

Japanese Bush Honeysuckle

Bush Honeysuckles (Amur, Morrow's, Tartarian, and Others)

Invasives in Your Woodland: Bush honeysuckles (Branching Out, Vol. 25, no. 3 - Fall, 2017)

USDA Forest Service

Maryland Invasive Species Council (Amur)

Maryland Invasive Species Council (Japanese)

Maryland Invasive Species Council (Morrow's)

Maryland Invasive Species Council (Tartarian)

 Plant Conservation Alliance's Alien Plant Working Group (all exotic bush honeysuckles)

 

 

Callery/Bradford Pear

Callery/Bradford Pear

Invasives in Your Woodland: Callery Pear (Branching Out, Vol. 25, no. 1 - Spring 2017)

USDA Forest Service

Maryland Invasive Species Council

Canada Thistle

Canada Thistle

USDA Forest Service

Maryland Invasive Species Council

Plant Conservation Alliance's Alien Plant Working Group

English Ivy

English Ivy

Invasives in Your Woodland: English Ivy (Branching Out, Vol. 25, no. 2 - Summer 2017)

USDA Forest Service

Maryland Invasive Species Council

Garlic Mustard

Garlic Mustard

Invasives in Your Woodland: Garlic mustard (Branching Out, Vol. 26, no. 4 - Winter 2018)

USDA Forest Service

Maryland Invasive Species Council

Plant Conservation Alliance's Alien Plant Working Group

Japanese Barberry fruit

Japanese Barberry

Invasives in Your Woodland: Japanese barberry (Branching Out, Vol. 25, no. 4 - Winter, 2017)

USDA Forest Service

Maryland Invasive Species Council

Japanese Hops

Japanese Hops

Maryland Invasive Species Council

Plant Conservation Alliance's Alien Plant Working Group

Japanese Knotweed

Japanese Knotweed

Invasives in Your Woodland: Japanese knotweed (Branching Out, Vol. 27, no. 3 - Summer 2019)

USDA Forest Service

Maryland Invasive Species Council

Plant Conservation Alliance's Alien Plant Working Group

Japanese stiltgrass. Photo by Chuck Bargeron, University of Georgia, www. invasive.org

Japanese Stiltgrass

Invasives in Your Woodland: Japanese Stiltgrass (Branching Out, Vol. 24, no. 1 - Spring 2016)

USDA Forest Service

Maryland Invasive Species Council

Plant Conservation Alliance's Alien Plant Working Group

Johnsongrass

Johnsongrass

Invasives in Your Woodland: Johnsongrass (Branching Out, vol. 29 no. 4 - Fall 2021)

USDA Forest Service

Maryland Invasive Species Council

Kudzu

Kudzu

Invasives in Your Woodland: Kudzu (Branching Out, vol. 27, no. 2 - Spring 2019)

USDA Forest Service

Maryland Invasive Species Council

Mile-a-minute berries

Mile-a-Minute

Invasives in Your Woodland: Mile-a-minute (Branching Out, Vol. 28, no. 1 - Winter 2020)

USDA Forest Service

Maryland Invasive Species Council

Multiflora Rose

Multiflora Rose

Invasives in Your Woodland: Multiflora rose (Branching Out, Vol. 26, no. 3 - Fall 2018)

Maryland Invasive Species Council

Plant Conservation Alliance's Alien Plant Working Group

Norway Maple

Norway Maple

Invasives in Your Woodland: Norway maple (Branching Out, Vol. 24, no. 3 - Fall 2016)

USDA Forest Service

Maryland Invasive Species Council

Oriental Bittersweet

Oriental Bittersweet

Invasives in Your Woodland: Oriental bittersweet (Branching Out, Vol. 26, no. 1 - Spring 2018)

USDA Forest Service

Maryland Invasive Species Council

Phragmites

Phragmites

Invader of the Month: A Reed Too Common | Maryland Invasive Species Council

Invasive Species of Concern in Maryland: Phragmites | Maryland Invasive Species Council

Purple Loosestrife

Purple Loosestrife

USDA Forest Service

Maryland Invasive Species Council

Plant Conservation Alliance's Alien Plant Working Group

Tree of Heaven (Ailanthus)

Tree of Heaven (Ailanthus altissima)

Invasives in Your Woodland: Tree-of-heaven (Branching Out, Vol. 29, no. 1 - Winter, 2021)

Penn State Extension

USDA Forest Service

Maryland Invasive Species Council

Wavyleaf basketgrass. Photo by Kerrie L. Hyde, Maryland DNR

Wavyleaf Basketgrass

Invasives in Your Woodland: Wavyleaf Basketgrass (Branching Out, Vol. 24, no. 2 - Summer 2016)

University of Maryland Extension

Maryland Department of Natural Resources

Maryland Biodiversity Project

Wild Garlic

Wild Garlic

Invasive Plant Atlas of the United States

Maryland Invasive Species Council