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Top U.S. Invasives

This list of problematic invasive plants includes horticultural escapees, out-of-range natives, and broadly dispersed range plants. Most are best avoided in U.S. gardens or landscapes.

Norway Maple

Acer platanoides

Ailanthus

Ailanthus altissima

Garlic Mustard

Alliaria petiolata (Alliaria officinalis)

Amur Peppervine

Ampelopsis brevipedunculata (Ampelopsis heterophylla)

Giant Reed

Arundo donax

Japanese Barberry

Berberis thunbergii

Cheatgrass

Bromus tectorum

Musk Thistle

Carduus nutans

Oriental Bittersweet

Celastrus orbiculata

Spotted Knapweed

Centaurea biebersteinii (Centaurea maculosa)

Yellow Star Thistle

Centaurea solstitialis

Camphor-tree

Cinnamomum camphora

Canada Thistle

Cirsium arvense

Crown-vetch

Coronilla varia

Scotch Broom

Cytisus scoparius

Water Hyacinth

Eichhornia crassipes

Russian Olive

Elaeagnus angustifolia

Autumn Olive

Elaeagnus umbellata

Winged Burningbush

Euonymus alata (Euonymus alatus)

Leafy Spurge

Euphorbia esula (Tithymalus uralensis)

Glossy Buckthorn

Frangula alnus (Rhamnus frangula)

English Ivy

Hedera helix

Hydrilla

Hydrilla verticillata

Lantana

Lantana camara

Japanese Privet

Ligustrum japonicum

Common Privet

Ligustrum vulgare

Japanese Honeysuckle

Lonicera japonica

Amur Honeysuckle

Lonicera maackii

Morrow's Honeysuckle

Lonicera morrowii

Tatarian Honeysuckle

Lonicera tatarica

Bell's Honeysuckle

Lonicera x bella

Purple Loosestrife

Lythrum salicaria

Punktree

Melaleuca quinquenervia

Chinaberry

Melia azedarach

Yellow Sweet Clover

Melilotus officinalis

Crystalline Ice Plant

Mesembryanthemum crystallinum

Nepalese Browntop

Microstegium vimineum

Reed Canary Grass

Phalaris arundinacea

Common Reed

Phragmites australis (Phragmites communis)

Japanese Knotweed

Polygonum cuspidatum

Mile-a-minute Weed

Polygonum perfoliatum

Velvet Mesquite

Prosopis velutina

Kudzu

Pueraria montana var. lobata (Pueraria lobata)

Bradford Pear

Pyrus calleryana 'Bradford'

Lesser Celandine

Ranunculus ficaria

European Buckthorn

Rhamnus cathartica

Multiflora Rose

Rosa multiflora

Himalayan Blackberry

Rubus discolor (Rubus procerus)

Giant Salvinia

Salvinia molesta

Brazilian Pepper

Schinus terebinthifolius

Johnsongrass

Sorghum halepense

Saltmarsh Cordgrass

Spartina alterniflora

Salt-cedar Tamarisk

Tamarix ramosissima

Tallowtree

Triadica sebifera (Sapium sebiferum)

Siberian Elm

Ulmus pumila

Chinese Wisteria

Wisteria sinensis

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