Invasive Exotic Plants of Southern Ontario

The following plants can cause serious damage to natural areas in Ontario, as identified by the Ontario Ministry of Natural Resources. Do not introduce these in landscaping and remove them if they are already present.

 Upland ecosystems

Trees
Norway maple Acer platanoides
  Scots pine Pinus sylvestris
  Black locust Robinia pseudoacacia
  White poplar Populus alba
  Siberian elm Ulmus pumila
Shrubs
Japanese barberry Berberis thunbergii
  Autumn olive Elaeagnus umbellata
  Russian olive Elaeagnus angustifolia
  Tartarian honeysuckle Lonicera tatarica
  Showy bush-honeysuckle Lonicera X bella
  Multiflora rose Rosa multiflora
  Common buckthorn Rhamnus cathartica
Herbs
Hoary alyssum Berteroa incana
  Smooth brome Bromus inermis
  Spotted knapweed Centaurea maculosa
  Celandine poppy Chelidonium majus
  Sand rocket Diplotaxis tenuifolia
  Quack grass Agropyron repens
  Orange daylily Hemerocallis fulva
  Dame’s rocket Hesperis matronalis
  Common St. John’s-wort Hypericum perforatum
  White sweet-clover Melilotus alba
  Wild parsnip Pastinaca sativa
  Bouncing Bet Saponaria officinalis
  Mossy stonecrop Sedum acre
  Hedge-parsley Torilus japonica
  White swallow-wort Cynanchum rossicum

 Moist ecosystems

Trees
European white birch Betula pendula
 
White mulberry Morus alba
 
Crack willow Salix fragilis
Shrubs
Glossy buckthorn Rhamnus frangula
Herbs
Goutweed Aegopodium podagraria
 
Garlic mustard Alliaria petiolata
 
Periwinkle Vinca minor

 Wetland or aquatic

Trees
Hybrid willow Salix x rubens
Shrubs
Black alder Alnus glutinosa
Herbs
European frog’s bit Hydrocharis morsus-ranae
 
Moneywort Lysimachia nummularia
 
Purple loosestrife Lythrum salicaria
 
European water milfoil Myriophyllum spicatum
 
Watercress Nasturtium microphyllum
 
Pondweed Potamogeton crispus

Comments are Closed

Social media & sharing icons powered by UltimatelySocial