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Invasive Plants

Gorse

Gorse (Ulex europaeus) is a spiny, perennial evergreen shrub, considered noxious under the BC Weed Control Act, and thrives on sunny clearings with dry, infertile soil such as sandy or rocky areas, roadsides,…Learn more

Hairy Cat’s Ear

Hairy cat's ear (Hypochaeris radicata) is a perennial that infests pastures, meadows, roadsides, river banks, lawns and disturbed open areas as well as legume and seed crops. It is also thought to…Learn more

Himalayan Balsam

Himalayan balsam (Impatiens glandulifera) is an exotic-looking annual that has pink, helmet-shaped flowers (also known as “policeman’s helmet”), rapid growth, and an entertaining mode of explosive seed dispersal. Unfortunately, this…Learn more

Himalayan Blackberry

Himalayan blackberry (Rubus armeniacus) is mostly a biennial plant, growing on disturbed sites, along roadsides and rights-of-ways, in pastures, along river and stream banks, fresh-water wetlands, riparian areas, forest edges, and wooded…Learn more

Hoary Alyssum

Hoary alyssum (Berteroa incana) is an annual to short-lived perennial. Considered regionally noxious under the BC Weed Control Act, hoary alyssum is most common on sandy or gravelly soils and establishes on roadsides,…Learn more

Hoary Cress

Hoary cress (Cardaria draba) is a perennial plant that invades hay fields, rangeland meadows and along roadsides, competing with native vegetation. It can be found on open, unshaded areas at low-…Learn more

Hound’s-Tongue

Hound’s-tongue (Cynoglossum officinale) is a biennial to short-lived perennial, and is considered noxious under the BC Weed Control Act. Hound’s-tongue is found on dry pasture, roadsides, and logged forestland. Found primarily in the…Learn more

Knotweeds

Knotweeds (Polygonum spp.) are invasive perennials, with four species found in British Columbia: Japanese knotweed (Fallopia japonica); Bohemian knotweed (Fallopia x bohemica); Giant knotweed (Fallopia sachalenensis); and Himalayan knotweed (Polygonum…Learn more

Marsh Plume Thistle

Marsh plume thistle (Cirsium palustre) is a biennial and considered regionally noxious under the BC Weed Control Act. The majority of sites are located in the central interior. Marsh plume thistle is actively…Learn more

Mountain Bluet

Mountain bluet (Centaurea montana) is a popular ornamental plant; its ability to self-seed and large blue flowers make it the top choice among many gardeners. Unfortunately, once planted, this species…Learn more

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