Invasive Species

Tartarian Honeysuckle



Invasive honeysuckles are commonly found in old fields, floodplains, forest edges and roadsides.

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Manitoba Maple



Manitoba maple prefers floodplains and stream banks, but is also adaptable to dry, disturbed sites. Female trees produce many winged seeds each year, and it has become naturalized in many cities and towns across Ontario.

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Garlic Mustard



Since its arrival in North America it has escaped into the wild and is now one of Ontario's most aggressive forest invaders.

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Common Buckthorn


Common buckthorn (also known as European buckthorn) is a small shrub or tree native to Eurasia. It was introduced to North Americain the 1880s as an ornamental shrub and was widely planted for fencerows and windbreaks in agricultural fields. Since then it has spread aggressively throughout southern Ontario and in other provinces.

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Purple Loosestrife


Purple loosestrife is a wetland plant native to Europe and Asia that was brought to North America the early 19th century. This highly invasive plant was likely introduced when its seeds were included in soil used as ballast in European sailing ships and discarded in North America.

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Black Locust


Since its arrival in North America it has escaped into the wild and is now one of Ontario's most aggressive forest invaders.

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