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Purple Loosestrife may grow up to 1 – 2 metres tall, with numerous erect stems. The flowers are reddish purple, found in ditches, wet meadows and marshes and along sides of lakes, this species is easily identifiable by its size and vibrant flowers.
Is a rather large, herbaceous perennial plant, whose raised nodes five it the appearance of bamboo although it is not closely related . A very successful plant that has been classified as an invasive species in several counties including Canada and particularly on Vancouver Island.
This plant spreads quickly, by both rhizome and water-dispersed seed. Although usually in shallow water, it is a primarily aquatic plant rhizomes may survive prolonged dry conditions. It has been widely planted in temperate regions such as Vancouver Island as an ornamental plant for bog gardens, it has escaped from cultivation to establish itself an an invasive which can create dense, monotypic stands, out competing other plants i the ecosystem.
Native to eastern Europe, this short-lived perennial may grow to 20 – 150 cm tall. Stream banks, pond shoreline and sandy prairies are common places for this invasive species to take hole as well as roadsides, pastures and alongside railroads or directly in the open.
Fast growing and invasive with a massive root system, English Ivy can be as pervasive as any invasive plant mentioned here. A rampant, clinging evergreen vine, it is a familiar sight in decorator gardens, on house walls, tree trunks and in wild areas where plants have been disposed. This plant may climb to 20 – 30 metres where suitable surfaces are available.
The sap from the Hogweed can cause blisters and long-lasting scars. These serious reactions are due to the furocoumarin (chemical compounds) derivatives in the leaves, roots, stems, flowers and seeds of the plant. Considered to be a noxious weed in many jurisdictions, Giant Hogweed is native to the Caucasus region in Central Asia and was brought to Vancouver Island as an ornamental plant in the 19th century.
We all know Scotch Broom or Scottish Broom as we like to call it. Found in sunny sites, beside roadways and clear cut and grassy or sandy hillsides. In come places in the world such as Vancouver Island Broom has become an ecologically destructive colonising invasive species.
A rather thorny evergreen shrub in the pea family, Gorse is known by a number of names such as furze or whin. As you can see Gorse is closely related to scotch broom and like them, has a green stem and very small leaves. This invasive plant of Vancouver Island, however differs from broom in that it has thorns and a very long flowering season.
Dalmatian Toadflax is a fast-growing, strong, has horizontal roots and can withstand strong cold winters. It is an invader of grasslands in the interior of British Columbia and has made its way to Vancouver Island. Originally cultivated as an ornamental in fabric dyes and for medicinal purposes this plan has become invasive
Widely naturalised every where in the world. The Himalayan Blackberry is prolific on Vancouver Island. In some areas the plants are cultivated for their berries, but in many areas, the blackberry is considered an invasive weed and high on the invasive plant list.