In Alberta, as with many other provinces, Giant Hogweed is being confused with its smaller and less toxic cousin – Cow Parsnip. Giant Hogweed is an invasive weed species that can cause skin irritation, blistering and burning upon contact. Thanks very much folks for your reports. Injuries Incidents & Reporting Procedures, 09. These systemic herbicides will be absorbed by the leaves and will move into the root to prevent regrowth the following year. plant. Giant Hogweed (Heracleum mantegazzianum) is a non-native invasive plant species that can grow abundantly along a range of habitat types, notably the banks of rivers and streams and some road corridors. According to Alberta Agriculture and Forestry, all plants reported in Alberta to date have proven to be cow parsnip. Researchers need to know what this plant looks like and how to identify Giant Hogweed when they are working in the field. Leaf stalks are spotted and produce a compound leaf that can expand to 1.5 met ers across. It's called giant hogweed and it doesn't play nice with humans. Giant hogweed has the potential to spread readily and grows along roadsides, ditches and streams. It has thick hollow stems and large lobed leaves. Giant Hogweed was introduced to the UK in the early 19th Century. Walkers who may brush against it, or gardeners who may unwittingly strim the plant getting the sap on themselves. Giant hogweed (Heracleum mantegazzianum) is a plant in the Apiaceae family (previously known as the Umbelliferae). This plant is now restricted in all provinces across Canada. Giant hogweed is much larger (up to 5 m high, as opposed to up to 3 m maximum), the leaves are more deeply lobed, and the leaf edges are more sharply serrated. Giant hogweed is often confused with cow parsnip (Heracleum lanatum), a very common native in Alberta. Description Grows up to 6 meters or more. Giant hogweed can reach a height of 20 feet and have a stalk diameter of one to three inches while cow parsnip generally is five to eight feet high and has a stalk diameter of one to two inches. These blisters can form black or purplish scars that can last for several years. This family includes some well-known plants such as parsley, carrot, parsnip, cumin and coriander. Link to Youtube, Giant Hogweed Identification and Comparison with Cow Parsnip Giant hogweed (Heracleum mantegazzianum), is a tall, cow parsley -like plant with thick bristly stems that are often purple-blotched. Giant Hogweed relies solely on seeds for reproduction and spread. Plants can grow as high as two to five and a half metres (15 to 18 feet). Seed bank and dispersal After falling from the parent plant, the seeds accumulate and mature in the soil. In Alberta, as with many other provinces, Giant Hogweed is being confused with its smaller and less toxic cousin – Cow Parsnip. Giant hogweed is also much larger than cow parsnip - it can grow to be several metres tall. A couple of key features can be used in differentiating the two. The main difference is the height and the fact that it can cause serious burns to the skin. … Giant hogweed (Heracleum mantegazzianum) is an umbellifer (member of the cow-parsley family), and its flowering stems are typically 2-3 m in height bearing flower heads up to 80cm across. This site is useful in that you will need suitable safety gear to protect yourself if you attempt to remove this plant. It is an invasive, alien plant that originates from the Caucasus Mountains in west central Asia where it grows in subalpine meadows and forest edges. Giant Hogweed First Aid treatment. It is not present (yet), in Alberta, Saskatchewan, Manitoba, PEI, North West Territories, and Nunavut. Giant Hogweed is suspected in the Yukon. Aside from its immense size, giant hogweed is also distinguished by its stout, dark reddish stem that can grow 5 cm to 10 cm in diameter. Wild parsnip is the only one with a yellow flower, however cow parsnip is equally noxious when it comes into contact with the skin and giant hogweed is considerably worse. Waste Disposal for Broken Glass & Sharps, 32. It does not reproduce by vegetative means, e.g. Stems have prominent purple blister-like pustules on the stems. Giant hogweed (H. mantegazzianum) is native to the Caucasus but is considered an invasive species in many areas outside its native range. Large flower (up to 75 cm wide) with 50 or more flower stems or rays. Official web site of The City of Calgary, located in Calgary, Alberta, Canada. Below are some useful sites on what the plant looks like and how to recognize the giant hogweed plant from other plants that appear similar: The next link shows how the BC government is trying to control the spread of Giant Hogweed in the Lower Mainland areas. Get Coronavirus (COVID-19) updates and information on closures, cancellations and service changes. Giant Hogweed has been confirmed in British Columbia, Ontario, Quebec, New Brunswick, Nova Scotia, Newfoundland and Labrador. It is not present (yet), in Alberta, Saskatchewan, Manitoba, PEI, North West Territories, and Nunavut. A mature plant has huge leaves, between 1–1.5 m (3 ft 3 in–4 ft 11 in) wide, and a stout, bright green stem with extensive dark reddish-purple splotches and prominent coarse white hairs, especially at the base of the leafstalk. It's part of the carrot family, but it can grow up to 14 feet tall. The stems are covered with reddish-purple flecks and stiff hairs filled with sap. 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