* Red Alert species: Species not yet established in Maryland but considered to be of high risk.
Key Code	Scientific Name	Common Name	Details
2	Acer platanoides	Norway Maple
2, 3	Ailanthus altissima	Tree of Heaven
2	Alliaria petiolata	Garlic Mustard
1, 3	Allium vineale	Wild Garlic
2, 3	Ampelopsis brevipedunculata	Porcelain Berry
2, 3	Artemisia vulgaris	Mugwort
2	Berberis thunbergii	Japanese Barberry
2	* Cardamine impatiens	Narrowleaf Bittercress
1, 2, 3	Carduus acanthoides	Plumeless Thistle
1, 2, 3	Carduus nutans	Musk Thistle
2	Celastrus orbiculatus	Oriental Bittersweet
2	Centaurea stoebe ssp. micranthos	Spotted Knapweed
1, 2, 3	Cirsium arvense	Canada Thistle
1, 2, 3	Cirsium vulgare	Bull Thistle
2	Elaeagnus umbellata	Autumn Olive
2	Euonymus fortunei	Winter Creeper
2, 3	Fallopia japonica	Japanese Knotweed
2, 3	Ficaria verna	Lesser Celandine
2, 3	* Frangula alnus	Glossy Buckthorn
2	Hedera helix	English Ivy
2	Hemerocallis fulva	Daylily
1, 4	Heracleum mantegazzianum	Giant Hogweed
2	Humulus japonicus	Japanese Hops
1, 2, 3	* Imperata cylindrica	Cogongrass
2	Lonicera japonica	Japanese Honeysuckle
2	Lonicera maackii	Amur Honeysuckle
2	Lonicera morrowi	Morrow's Honeysuckle
2	* Lonicera standishii	Standish's Honeysuckle
2	Lonicera tatarica	Tatarian Honeysuckle
1, 2	Lythrum salicaria	Purple Loosestrife
2	Microstegium vimineum	Japanese Stiltgrass
2	Miscanthus sinensis	Chinese Silvergrass
2	Morus alba	White Mulberry
2	Murdannia keisak	Marsh Dayflower
2	Oplismenus undulatifolius	Wavyleaf Basketgrass
2	Paulownia tomentosa	Princesstree, Paulownia
2, 3	Perilla frutescens	Perilla
2	Persicaria perfoliata	Mile-a-minute
2	Phalaris arundinacea	Reed Canarygrass
1, 2, 3	Phragmites australis	Phragmites
2	Phyllostachys spp.	Running Bamboos
2, 3	Pueraria montana var. lobata	Kudzu
2, 3	Pyrus calleryana 'Bradford'	Callery/Bradford Pear
2, 3	* Rhamnus cathartica	Common Buckthorn
2	* Rhodotypos scandens	Jetbead
2, 3	Rosa multiflora	Multiflora Rose
1, 2, 3, 4	* Rottboellia cochinchinensis	Itchgrass
2	Schoenoplectus mucronatus	Bog Bulrush
1, 3	Sorghum bicolor	Shattercane
1, 2, 3	Sorghum halepense	Johnsongrass
2, 3, 4	* Tribulus terrestris	Puncturevine
2	Wisteria sinensis Wisteria floribunda	Chinese Wisteria Japanese Wisteria