It produces a noxious sap that sensitizes the skin to ultraviolet light. This species is Introduced in the United States. Includes habitat, identifying features and what you can do to reduce its impact. ... point and GIS data. Login to download data. Giant Hogweed is not currently abundant in the Credit River Watershed. Confirmed reports of giant hogweed have been made as far north as Kapuskasing. Wet Dock Map 2020. Giant hogweed can be a serious health hazard for humans. Back Country Campsite Map 2020. Directions for data collection and entry, templates for data collection, and a data dictionary are available on the Tools & Training page. It has thick hollow stems and large lobed leaves. It can be hazardous to human health. The small outbreak of Giant Hogweed is located midway between that point and the original foot-trail. Giant hogweed is a native of the Caucasus Mountain region between the Black and Caspian Seas. Giant hogweed is listed under the Noxious Weeds in Ontario list and is listed as a restricted species under the Invasive Species Act. The reaction of the skin depends on individual sensitivity. The plant grows to impressive heights. 53,907 Point Reports This has raised local public concerns and interest in the plant. Giant Hogweed Giant hogweed is an invasive species with broad leaves and a dense canopy that can out-compete the growth of many native species. It can grow up to five metres in height. Its very robust stem is covered with stiff white hairs and numerous, very distinct, extensive, raspberry-red to purple spots. Now you can submit invasive species observations directly with your smartphone from the field. Giant hogweed has been mistaken for other species, especially other members of the carrot family. In 2010, Ontario listed giant hogweed as a provincially noxious weed under the Weed Control Act. Giant hogweed can measure from two to five meters high, or thirty centimetres to one meter after mowing. Giant Hogweed Statewide Distribution Map. Here Express.co.uk maps exactly where the toxic plant is and what you can do to avoid it. Combining biological and identifying characteristics of top interfering species along with new emerging research articles, media, and control options, weedinfo.ca provides the tools to make informed risk-reducing weed control decisions. Giant hogweed can pose a serious health hazard for humans. COVID-19: Get the latest updates , take a self-assessment or learn about the COVID Alert exposure-notification app . Forty U.S. States and Four Canadian Provinces have active EDDMapS programs. Wildwood Pit. Ontario's definition of an invasive species may include species native to Ontario, that have been introduced to a new geographic region due to human activity. Giant Hogweed is an Asian plant that was brought to North America about a century ago and is now spreading throughout southern Ontario. As of 1975, giant hogweed populations along Ontario's Saugeen River were described as "firmly established" and "very much at home" . Giant Hogweed is an Asian plant that was brought to North America about a century ago and is now spreading throughout southern Ontario. According to Alberta Agriculture and Forestry, all plants reported in Alberta to date have proven to be cow parsnip. It was later transported to the United States and Canada as a showpiece in arboreta and Victorian gardens (one of the first North American planting… Plants require 2 to 5 years from germination to develop a flowering stem. Flowering stems up to 5m high and up to 10cm in diameter, hollow except at the nodes; both stems and petioles having conspicuous reddish-purple flecks throughout and sometimes nearly solid purple near the base; lower stem often very rough with sharp-pointed, irregularly-spaced bumps. Food Issues . EPPO Global Database - Heracleum mantegazzianum. This species is Introduced in the United States. Inflorescence a compound umbel up to 120cm across, consisting of many (approximately 30 to 50) branches, each branch ending in a simple umbel with approximately 30 to 40 flowers; the whole compound umbel with a flat bottom and gently rounded top; petals white or rarely pinkish and up to 12mm long; fruit oval in outline, 7- 3mm long, 6-10mm wide and 1-3mm thick, smooth to softly hairy, with usually 4 prominent dark-coloured oil tubes. Giant hogweed has a scattered distribution across southern and central Ontario, south of the line from Manitoulin Island to Ottawa. It is distinguished by its huge size, its very large, compound leaf blades, its tall, thick, hollow, often sharply roughened stems, and its large flat-topped compound inflorescence with white flowers and large, flat fruits with prominent dark-coloured oil tubes. A song was written about Giant Hogweed appropriately called "The Return of The Giant Hogweed" it was performed by Genesis Click here to see a live version of the song. Giant hogweed is an invasive plant species of the carrot family, that resembles some of our native species such as Angelica, and Cow parsnip. Giant Hogweed has two major negative impacts. Fish Species of the Thames River. It has large, flat-topped to slightly dome-shaped flower (similar to Queen Anne’s Lace/Wild Carrot) and seed head and a bumpy or bristly stem. The Brant-area man started the Giant Hogweed Mitigation Project to help landowners and citizens get rid of giant hogweed. Distinguishing Features. Giant hogweed was introduced to Canada via Asia, and it has thrived in our various climates. Heracleum mantegazzianum, commonly known as giant hogweed, is a monocarpic perennial herbaceous flowering plant in the carrot family Apiaceae. The main difference is the height and the fact that it can cause serious burns to the skin. Distribution Maps Species Information ... That side-trail momentarily curves to the south. PA-Giant Hogweed (HEMA17) Swedish Virtual Flora: images & text (in Swedish) (HEMA17) Universitat Bonn: image and text (in German) (HEMA17) WA-King County Noxious Weeds (HEMA17) WA-NonNative Freshwater Plants (HEMA17) WA-The Perils of Giant Hogweed (WSU) (HEMA17) Giant Hogweed has the potential to spread readily and grows along roadsides, ditches and streams. were applied.. Eradicated - Subject was present previously but is not at time of survey and has been determined to be removed from the area surveyed. Lake Trail & Reservoir Map 2020. The flowers are large umbrella-shaped cluster of small white flowers that closely resemble the wildflower Queen Anne’s Lace (also invasive in North America). Giant Hogweed is native to the Caucasus Mountains and Southwestern Asia. Invasive species are defined as harmful alien species whose introduction or spread threatens the environment, the economy, or society, including human health. Alien species are plants, animals, and mico-organisms introduced by human action outside their natural past or present distribution. Distribution Maps Species Information Tools & Training My EDDMapS About giant hogweed Heracleum mantegazzianum Sommier & Levier . 53,972 County Reports Giant hogweed is an extremely invasive species that originated from Asia and Eastern Europe. Unlike native species, Hogweed can grow up to 5 metres tall and has an herbaceous stem (the plant dies to the ground in … Flower stalks and leaf stems contain stiff hairs with a bristly feel. It invades old fields and native habitats such as open woodlands. Giant Hogweed. Plants forming rosettes to 1m (40in.) Giant hogweed has a scattered distribution across southern and central Ontario, south of the line from Manitoulin Island to Ottawa. View larger map of giant hogweed sites that have been treated and eliminated. Its leaves can be up to 1.5 meters wide and three meters long. Giant hogweed is very poisonous: Skin contact with the sap in the presence of UV light (such as sunlight) can cause swelling, itching, and blistering that lasts for months. What do I do if I find giant hogweed on public property? Giant hogweed was introduced to Canada via Asia, and it has thrived in our various climates. Giant Hogweed was introduced to the UK in the early 19th Century. Giant hogweed, or Heracleum mantegazzianum is considered a noxious weed by the federal government. Does the Ontario Pesticide Ban permit municipalities to control giant hogweed using pesticides? Habitat: Roadsides, streambanks, waste areas, yards . A member of the carrot and parsley family of plants (Apiaceae), giant hogweed is native to the Caucasus region of Eurasia. It was first collected from Nova Scotia in 1980 and Quebec in 1990. Report all Giant Hogweed and other invasive species sightings to the Ontario Federation of Anglers and Hunters/Ontario Ministry of Natural Resources by calling the Invading Species Hotline at 1-800-563-7711 or visit www.invadingspecies.com Giant hogweed leaves are shiny and large, with leaf edges very coarse and serrated, like a jagged saw edge. Yes, data can be submitted through the My EDDMapS page via the "Upload Data" link. Because of its unique size and impressive flower head, the plant was originally introduced to Great Britain as an ornamental curiosity in the 19th century. But gardening experts … Cow parnsip . Giant Hogweed (Heracleum mantegazzianum) is a perennial plant and a member of the carrot family. Answer 1 of 5: We recently had a picnic by the stream running through Nederland and came upon what looked like a giant Queen Anne's Lace weed. If the plant’s watery, clear sap comes into contact with human skin and is then exposed to sunlight, the UV radiation can cause severe burning and weeping blisters. Media stories on giant hogweed have drawn attention to this invasive plant and the fact that it can cause skin irritation, blistering and burning upon contact. If you have been exposed to this plant, if is often suggested that you wash affected area immediately, avoid direct exposure to sunlight and seek medical advice. Giant hogweed has been found on several GRCA properties near Belwood Lake, St. Jacobs, Kitchener, Guelph and Cambridge. If skin is exposed to the sap or if you brush against the plant, the area should be covered immediately and washed as soon as possible. Giant hogweed has the potential to spread readily and grows along roadsides, ditches and streams. Giant Hogweed is an Asian plant that was brought to North America about a century ago and is now spreading throughout southern Ontario. Characteristics of this plant include: Plants can grow up to 2.5 – 4 metres in height (8-14 feet) Yes, EDDMapS is developed and run by the Center for Invasive Species and Ecosystem Health that runs the Bugwood Image Database System and Bugwood Wiki. In York Region, isolated plants have been found in Jackson's Point on properties on Lake Drive East, Hoffman Drive and on Malone Street. Plants forming rosettes to 1m high the first year; in the second year, either sending up a flowering stem, or remaining vegetative and producing a very large rosette of huge leaves, these including their petioles, up to 2m high, and flowering in the third year. Giant Hogweed - Side Effects: 703.83 KB: Sch B Exemption: 25.6 KB: Sch C Good Forestry Practices: 50.98 KB : Sch D Circumference Harvest: 29.49 KB: Sch E Eastern White Cedar: 29.74 KB: Bruce County Forest HCV Report (Maps Available Upon Request) 618.23 KB: Predator Control By-law 2013-046 (Coyotes) 2.01 MB: Coyote Claim Form Sch A By-law 2013-046: 73.2 KB: County Forest Conservation … Invasive species are defined as harmful alien species whose introduction or spread threatens the environment, the economy, or society, including human health. These species include; Angelica, Wild carrot (daucus carota), Goutweed (aegopodium podagraria), poison hemlock (conium maculatum), water-parsnip (sium suave), spotted water-hemlock (cicuta maculata) and angelica (angelica atropurpurea). Giant hogweed, which can cause blistering, is a species that can be found in gardens, originally brought in as a horticultural plant. Giant hogweed (Heracleum mantegazzianum) is a VERY LARGE, invasive plant that can cause painful burns and permanent scarring. blooms in July. Heracleum mantegazzianum, commonly known as giant hogweed, is a ... By 1950, giant hogweed had appeared in southern Ontario, and within a quarter century, the plant was firmly established in Ontario. Giant hogweed is not new to Canada, but every summer unsuspecting residents come into contact with the dangerous plant, leading to rashes, burns and -- in extreme cases -- blindness. 406 Species, EDDMapS Ontario Terrestrial Plants Datasheet, EDDMapS Ontario Fish and Invertebrates Datasheet, The University of Georgia - Center for Invasive Species and Ecosystem Health, Real time tracking of invasive species occurrences, Electronic early detection reporting tools, Library of identification and management information. and leaf stalks have purple streaks, blotches, lines, and/ or spots. Giant Hogweed. Giant hogweed invades Russia http://www.russiatoday.com/Top_News/2009-07-13/Giant_Hogweed_invades_Russia__spreading_to_America.html A song was written about Giant Hogweed appropriately called "The Return of The Giant Hogweed" it was performed by Genesis Click here to see a live version of the song. How can it hurt you? Research has also shown that furanocoumarins in general may be carcinogenic and teratogenic. http://www.youtube.com/watch?v=SDwyBWjfFaM, http://www.weedinfo.ca/media/pdf/page_biology_canada_weeds.pdf, http://www.russiatoday.com/Top_News/2009-07-13/Giant_Hogweed_invades_Russia__spreading_to_America.html, http://www.youtube.com/watch?v=KaV2jwNT0MQ, Controlling Hogweed with Garden Centre Products, The Biology of Invasive Alien Plants in Canada, Giant Hogweed Management - Research Summary 2010. Ontario Invading Species Awareness Program (Hotline 1-800-563-7711) Ontario Ministry of Natural Resource - Giant Hogweed; Ontario Ministry of Natural Resources - Wild Parsnip; Ontario Weeds; Ontario Invasive Plant Council; Ontario Ministry of Agriculture, Food and Rural Affairs - Giant Hogweed Treated - Subject was present at time of report and control efforts (e.g. Distribution Map If you know of a sighting and wish to report it, the Ontario Ministry of Natural Resources is maping Giant Hogweed … The Brant-area man started the Giant Hogweed Mitigation Project to help landowners and citizens get rid of giant hogweed. European and Mediterranean Plant Protection Organization. Height: Giant hogweed can grow up to 5.5 m (18 ft) in ideal conditions, however, such sizes are rare.The plant typically grows 3-5 m (10-16 ft) in Ontario. Giant Hogweed and Wild Parsnip are both invasive perennial plants belonging to the carrot family, native to Europe and Asia. Extensive populations have been found within the Greater Toronto Area. Living Alone. Hogweed hysteria is sweeping the nation, with many worried about the giant weed that grows to five metres tall and emits a burning sap. These resources provide over 50,000 images and over 1000 articles on invasive species. Flowers from June to August. Once again, its \"giant\" size is the easiest distinguishing feature, as it towers above these other species. A song was written about Giant Hogweed appropriately called \"The Return of The Giant Hogweed\" it was performed by Genesis http://www.youtube.com/watch?v=SDwyBWjfFaM to see a live version of the song. Flowering only once in its lifetime and reproducing only by seed. This has provided a regulatory tool for weed managers to control giant hogweed where it could affect agricultural or horticultural operations. Ontario's definition of an invasive species may include species native to Ontario, that have been introduced to a new geographic region due to human activity. It's part of the carrot family, but it can grow up to 14 feet tall. THIS map reveals the hot spots where Britain's most dangerous plant is growing out of control. Points Species Info. It can be found throughout Southern Ontario. READ MORE: Giant hogweed is spreading across Ontario The non-native plant grows up to six metres in height and has large clusters of white flowers … Giant Hogweed. Second year giant hogweed plant with rosette leaves up to 125 cm high plus central stem with 2 leaves emerging through the top of the rosette. Its watery, clear sap contains photosensitizing compounds (furanocoumarins), which, when in contact with human skin and in combination with UV radiation, can cause burning http://imgur.com/a/JglRD. Positive - Subject was present at time of report.. FarmGate Map. View larger map of known giant hogweed locations. Giant hogweed (Heracleum mantegazzianum) is an invasive plant species that has gone viral in more ways than one. • Report all Giant Hogweed and other invasive species sightings to the Ontario Federation of Anglers and Hunters/Ontario Ministry of Natural Resources by calling the Invading Species Hotline at 1-800-563-7711 or visit www.invadingspecies.com Please report sightings of Giant Hogweed in the Nottawasaga Valley watershed to the NVCA ... Ontario's Invading Species Awareness Program (Canada). Giant hogweed needs moist conditions much of the year but can tolerate moderate droughts. For more detailed information on locations, Weed Info has a Google map of confirmed sightings in Southern Ontario. Leaves: Leaves are notably spiked with a jagged appearance.. Users can take pictures and use the built in GPS to quickly report from the field. Giant hogweed on GRCA properties. Giant hogweed sap will make a person's skin extremely sensitive to sunlight. It's part of the carrot family, but it can grow up to 14 feet tall. H. mantegazzianum is also known as cartwheel-flower, giant cow parsley, giant cow parsnip, or hogsbane.In New Zealand, it is also sometimes called wild parsnip (not to be confused with Pastinaca sativa) or wild rhubarb. Content varies depending on plant part, but contact should be avoided at all times. Where Giant Hogweed is Found. Giant hogweed sap will make a person's skin extremely sensitive to sunlight. View a PDF of this giant hogweed map. Anyone who thinks they've spotted Giant Hogweed is asked to contact the city immediately at 3-1-1. Educate yourself on known invasive species in your area, Never plant, transport, spread, or release invasive species, Report invasive species to EDDMapS Ontario or the Invading Species Hotline, Custom Queries and Downloads to XLS, KML and Shapefiles. Giant hogweed's toxic sap leaves victims with horrific burns … The biology of Invasive Alien Plants in Canada http://www.weedinfo.ca/media/pdf/page_biology_canada_weeds.pdf Giant Hogweed Video http://www.youtube.com/watch?v=KaV2jwNT0MQ, If you know of a sighting and wish to report it, the Ontario Ministry of Natural Resources is maping Giant Hogweed populations. States Counties Points List Species Info. Giant hogweed, or Heracleum mantegazzianum is considered a noxious weed by the federal government. Firstly, due to its invasive nature, it poses a threat to native biodiversity. weedinfo.ca was designed to be an ever-growing knowledge base of weed information. top. Giant Hogweed is an Asian plant that was brought to North America about a century ago and is now spreading throughout southern Ontario. • Report all Giant Hogweed and other invasive species sightings to the Ontario Federation of Anglers and Hunters/Ontario Ministry of Natural Resources by calling the Invading Species Hotline at 1-800-563-7711 or visit www.invadingspecies.com Please report sightings of Giant Hogweed in the Nottawasaga Valley watershed to the NVCA top It has been implicated as a cause of severe dermatitis in susceptible individuals (see human health issues). These reports are uploaded to EDDMapS and e-mailed directly to verifiers for review. It can be hazardous to human health. Giant Hogweed is an invasive, non-native plant introduced from Asia. It can be hazardous to human health. Name: Giant hogweed, Heracleum mantegazzianum Somm. Giant hogweed flower. What you need to know about giant hogweed. Yes, regional apps are available for iPhones, iPads and Android devices. Health Issues. The EDDMapS Ontario app brings the power of EDDMapS to your smartphone. It is a perennial and a member of the carrot and parsley family. After 24hrs, reddening and swelling of the skin can be noticed, which is followed by an inflammatory reaction after 3 days. Both are found in many areas throughout southern Ontario, and are now widespread in Whitby's naturalized areas, particularly along stream banks, roadsides and disturbed open areas. Login to download data. The leaves and flowers are very similar to that of cow parsley and the identification of Giant Hogweed is often confused for it. Fish and Wildlife Service. & Lev., Other Names: berce du Caucase Family: Carrot Or Parsley Family (Umbelliferae) General Description: Biennial or perennial, flowering only once in its lifetime and reproducing only by seed. It can be hazardous to human health. Giant Hogweed, (Heracleum Mantegazzianum), is an invasive plant known for its enormous size. Go to: http://www.comap.ca/its. Description. Central stem produces large umbel of flowers. Seed production varies from 5,000 to 100,000 per plant with an average seed production of 20,000 per plant. The plant is named after the mythological god Hercules (he of robust size and strength). Flowering stems up to 5m high and up to 10cm in diameter, hollow except at the nodes; both stems and petioleshaving conspicuous reddish-purple flecks throughout and sometimes nearly solid purple near the base; lower stem often very rough with sharp-pointed, irregularly-spaced bumps. Forest & Landscape Denmark, Forest & Landscape Denmark, Hoersholm. There are currently no confirmed cases of giant hogweed in Calgary, but this invasive plant is a weed of serious concern in British Columbia, Ontario and the Atlantic Provinces. Negative - Subject was not present at time of report.. Giant hogweed was introduced from Europe, presumably as an ornamental, and has escaped along roadsides, streambanks and waste areas in scattered localities in southern Ontario. The GRCA has a program to eliminate giant hogweed from its property, but it is a persistent species that is difficult to remove. Giant hogweed was still available for sale in Canadian nurseries as late as 2005. Virginia Tech researchers who helped identify the dangerous Giant Hogweed plants in Clarke County, Virginia, want residents to stay on the lookout for the plant with toxic sap that can cause severe burns — but also stressed that the weeds are believed to have been planted intentionally decades ago and haven’t spread in the years since. Stem: Can range from 10-15 cm in diameter with course hairs.The stem can either be completely covered in purple or purple spots. Giant Hogweed Resources. The stems are covered with reddish-purple flecks and stiff hairs filled with sap. Links: tdc's FarmGate - Giant Hogweed in Eastern Ontario. Reproduction: Reproduces by seed only. mechanical, chemical, etc.) Dry Dock Map 2020. Giant hogweed is a spectacular, impressive plant. Giant hogweed is not new to Canada, but every year unsuspecting residents come into contact with the dangerous plant, leading to rashes, burns and -- in extreme cases -- blindness. Giant Hogweed Fact Sheet. It is a garden ornamental from southwest Asia that is invading in North America and becoming more common in southern and central Ontario. Giant hogweed (Heracleum mantegazzianum) is a TOXIC weed containing a substance within its sap that makes human skin ultra-sensitive to UV light.Large, watery, burn-like rashes appear within 15-20 hours after skin is exposed to the sap and then to sunlight. Leaf blades of rosette leaves very large, up to 1m across, compound with 3 large deeply cut leaflets, each leaflet with deep irregular lobes and coarse, sharp teeth on all margins; their petioles often with sharp-pointed bumps similar to those on the flowering stems; leaves on the flowering stem of similar shape but smaller, the upper ones often not divided but just deeply 3-lobed. These apps include high-resolution images, descriptions and distribution maps. Beware! Are there other weeds in Halton Region that can cause similar health effects? Campsite and Day Use Map 2020. Giant Hogweed (Heracleum mantegazzianum) is a perennial plant and a member of the carrot family. File types accepted are csv, xls/xlsx, kml/kmz, gbd, and gis files. Blue-green Algae Fact Sheet Giant Hogweed is present in a variety of location in Southern Ontario including Mississauga, Milton, Markham, Toronto, and generally establishes along roadsides, forest edges, and streams. Giant hogweed was introduced from Europe, presumably as an ornamental, and has escaped along roadsides, streambanks and waste areas in scattered localities in southern Ontario. It's part of the carrot family, but it can grow up to 14 feet tall. Distribution Map If you know of a sighting and wish to report it, the Ontario Ministry of Natural Resources is maping Giant Hogweed … GIANT Hogweed - dubbed ‘the most dangerous plant in Britain’ - is spreading its way across Britain. Giant hogweed, or Heracleum mantegazzianum is considered a noxious weed by the federal government. Home / Terrestrial Invasives / Terrestrial Plants / Giant Hogweed / Giant Hogweed Resources. It is a garden ornamental from southwest Asia that is naturalizing in North America and becoming more common in southern and central Ontario. Are there municipal by-laws in place to control giant hogweed? Giant hogweed sap will make a person's skin extremely sensitive to sunlight. Outdoor workers in southern Ontario can encounter giant hogweed near roadsides, streams, vacant lots, and waste areas. Giant hogweed was introduced to Canada via Asia, and it has thrived in our various climates. Flowering inflorescences are often heavily infested by aphids. It was introduced as an ornamental plant into Europe and has since spread to Canada and the United States. Noxious under the Ontario Weed Control Act. READ MORE: Severe Giant Hogweed burns prompt personal warning from Ontario man Dan Kraus, a biologist with the conservancy, said the invasive Asian … Nielsen, C., Ravn, HP, Nentwig, W., Wade, M. (2005) The Giant hogweed best practice manual: guidelines for the management and control of an invasive weed in Europe. Giant hogweed is a nasty, nasty plant. It is located on the creek's east bank .. visible from the main foot-trail, looking across the creek from the west bank. Giant hogweed was introduced to New York state in about 1917 , and reports suggest that it occurred in southern Ontario by the late 1940s or early 1950s [33,74]. Giant hogweed is a nasty, nasty plant. Giant hogweed sap will make a person's skin extremely sensitive to sunlight. Giant hogweed (Heracleum Mantegazzianum) is an invasive plant known for its enormous size. York, Ontario, Canada Coordinates. Secondly, Giant Hogweed is a public health hazard. Maps can be downloaded and shared. Studies have shown seeds to remain viable for up to 15 years. Giant Hogweed. You will find giant hogweed in Halton Region along Sixteen Mile Creek. Care of Your Trees. Brushing against or breaking the plant releases sap that, combined with sunlight and moisture, can cause a severe burn within 24 to 48 hours. Giant Hogweed (Heracleummantegazzianum ) • Public health threat • Causes photo-dermatitis • Contact with sap makes skin photosensitive which causes painful blisters • Also a threat to biodiversity • Greenhouses import due to its interesting ornamental appeal • Seeds are easily transported. Location. Stem of giant hogweed exuding clear, watery sap. EDDMapS has national support from the U.S. Forest Service, U.S. Army Corps of Engineers, National Park Service, National Institute of Food and Agriculture and U.S. Wildwood Water Levels. Plants can grow as high as two to five and a half metres (15 to 18 feet). Depending on individual sensitivity, effects can last for months and skin can remain sensitive to UV light for years. Giant hogweed also poses a serious health risk since its stalks, leaves and bristles contain a noxious sap that sensitize skin to sunlight. Distribution Maps Species Information Tools & Training My EDDMapS About giant hogweed Heracleum mantegazzianum Sommier & Levier . 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