Except ... rent as of the date of the fact sheet. Heracleum mantegazzianum Sommier & Levier (ITIS), Produces toxic sap that can cause skin irritation and blindness (Gucker 2009). 0 Impacts: Giant hogweed outcompetes native plant species for habitat. The leaves are extremely large growing to … Whiteville, North Carolina. Before sharing sensitive information online, make sure you’re on a .gov or .mil site by inspecting your browser’s address (or “location”) bar. Reproduction and spread: Giant hogweed plants reproduce via seed. Giant hogweed's stem can range from 10-15 cm in diameter with course hairs. Home and Garden Information Center. 0000161570 00000 n Giant hogweed is a short lived herbaceous biennial that dies after flowering (monocarpic). Giant Hogweed Information Sheet (PDF) 343 59 0000003275 00000 n Invasive Species, 2270 Old Penitentiary Road, Boise, ID, 83712, United States giant hogweed. 0000008571 00000 n 0000183810 00000 n Heracleum mantegazzianumis the most common invasive large hogweed (growing up to 5.5 m) found in both Europe and North America. Plant Industry. 0000009553 00000 n ����W`{z��s�,2R:����LLv,����ý�-��O Giant hogweed is actually the common name of four species of large hogweeds that are invasive outside of their native range. GIANT HOGWEED The preferred method of control is integrated pest management (IPM). Anyone who suspects they have found Giant Hogweed should take photos, check online to compare the plant to giant hogweed photos, and then contact a Virginia Cooperative Extension agent. 0000007918 00000 n 0000241388 00000 n Except for its size, the plant can be mistaken for a number of native, noninvasive plants such as cow parsnip (Heracleum lanatum), Angelica (Angelica atropurpurea), and poison hemlock (Conium maculatum). Integrated Taxonomic Information System. %%EOF University of Alaska - Anchorage. Invasive Species Alert Sheet Giant Hogweed. Virginia Tech; Virginia State University. USDA. In: Fire Effects Information System. 0000241861 00000 n Common Name: Giant Hogweed Scientific Name: Heracleum mantegazzianum Sommier & Levier Family: Apiaceae Description: A biennial or perennial herb in the carrot family growing to 15’ tall, with a taproot or fibrous roots. Michigan Department of Agriculture and Rural Development. 0000005365 00000 n Invasive Species Council of British Columbia (Canada). 0000240771 00000 n It prefers moist, disturbed soil and It is known to grow in freshwater wetlands, grasslands, dis-turbed areas, urban areas, and gardens. 0000013344 00000 n Giant hogweed seeds can survive in the soil seed bank for more than 5 years. European Network on Invasive Alien Species. Giant hogweed occurs in the following Canadian provinces: The large flat cluster, umbel, of small white flowers is reminiscent of Queen Anne’s Lace, but giant hogweed’s umbel is much larger, growing up to 2½â€™ in diameter. The section below contains highly relevant resources for this species, organized by source. Gucker, C.L. 0000002099 00000 n This site is also protected by an SSL (Secure Sockets Layer) certificate that’s been signed by the U.S. government. Ontario's Invading Species Awareness Program (Canada). 0000005127 00000 n 0000012268 00000 n 0000006488 00000 n 0000009806 00000 n Revised January 2019 Habitat and biology • Perennial plant from carrot or parsley (Apiaceae) family • Mature plants flower in May, producing up to 100,000 seeds that are viable in soil to 15 years • Reproduces by seeds, possibly vegetative New York Department of Environmental Conservation. 0000002281 00000 n Giant hogweed requires disturbance to estab-lish so it is important to maintain/restore desirable vegetation in habitats suitable for invasion. GRIN-Global. Unlike native species, Hogweed can grow up to 5 metres tall and has an herbaceous stem 5 to 10 centimetres in diameter. Habitat Morphology 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 has large, flat-topped to slightly dome-shaped flower and seed head and a bumpy or bristly stem. 0000112515 00000 n 0000240033 00000 n 0000007013 00000 n 0000002444 00000 n 0000011460 00000 n Giant hogweed sap contains toxins that causes severe dermatitis when it contacts skin in the presence of sunlight (i.e. Division of Plant Industry. Weed Research and Information Center. Giant Hogweed (Heracleum mantegazzianum) is a plant native to Asia. Giant hogweed, or Heracleum mantegazzianum is considered a noxious weed by the federal government. 0000007239 00000 n Giant hogweed (Heracleum mantegazzianum), also known as Giant cow parsnip is a perennial plant and a member of the carrot family. 0000002573 00000 n 0000015364 00000 n Division of Plant Industry. The leaves and flowers are very similar to that of cow parsley and the identification of Giant Hogweed is often confused for it. It can grow to a height of 15 to 20 feet. National Invasive Species Information Center, Virginia Tech Scientists who Identified Dangerous Giant Hogweed in Clarke County Hopeful That it will be Contained (Jun 18, 2018), Early Detection & Distribution Mapping System (EDDMapS) - Giant Hogweed, Pest Tracker - Survey Status of Giant Hogweed, YouTube - Giant Hogweed: A Herculean Weed with Power, Factsheet - Giant Hogweed (Mar 2017) (PDF | 758 KB), Fact Sheet: Giant Hogweed (Jan 2014) (PDF | 804 KB), Alaska Exotic Plants Information Clearinghouse (AKEPIC): Species Biography - Giant Hogweed (Feb 7, 2011) (PDF | 235 KB), NOBANIS: Invasive Alien Species Fact Sheet -. National Genetic Resources Program. It blooms in midsummer. Date Posted 08/31/2020. 0000014726 00000 n The https:// means all transmitted data is encrypted — in other words, any information or browsing history that you provide is transmitted securely. The stem and leaf stalks are … Australian Government. 0000162259 00000 n Or, to display all related content view all resources for Giant Hogweed. New Hampshire Department of Agriculture, Markets, and Food. Giant hogweed has the potential to spread readily and grows along roadsides, ditches and streams. 0000007125 00000 n 0000005660 00000 n Pennsylvania Department of Conservation and Natural Resources. 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. It was likely introduced to North America as an ornamental garden plant. Toxic sap is found in the leaves, stems, flowers, and roots of giant hogweed. Giant hogweed (Heracleum mantegazzianum) is a member of the carrot or parsley family, Apiaceae (Umbelliferae). 0000005315 00000 n 0000004633 00000 n Giant hogweed is an herbaceous dicotyledonous plant that is classified as having a biennial life cycle. 0000184503 00000 n Giant hogweed is a massive plant; it usually only lives for 2 years but it can grow to a height of 15’ and has enormous leaves and flower clusters. Heracleum mantegazzianum. 0000166692 00000 n It is a long term project, possibly taking 5 to 10 years, if dealing with an established growth. Its presence along river xref 343 0 obj <> endobj It invades old fields and native habitats such as open woodlands. startxref 0000009146 00000 n Nuisance & Invasive Species - Giant Hogweed: Do Not Touch This Plant! The .gov means it’s official. 0000121240 00000 n Effects may include welts, rashes, and blistering, followed by pigmented scarring that may persist for as long as six years. It is a garden ornamental from southwest Asia that is naturalizing in North America and becoming more common in southern and central Ontario. European and Mediterranean Plant Protection Organization. Gian hogweed can grow near roads and trails. Hollow stalks and stem produce sturdy bristles. Skin coated with this sap can become sensitive to sunlight and develop painful, burning blisters. 0000012678 00000 n CONCERN plants by monopolizing Giant hogweed can have negative impacts on both the environ-ment and human health. Purdue University Extension. Washington State Noxious Weed Control Board. This is very similar-looking to giant hogweed but is much smaller. University of Georgia. APHIS. 0000002617 00000 n Grand River Conservation Authority – July 2010 GIANT HOGWEED (Heracleum mantegazzianum) FACT SHEET Habitat: Giant Hogweed is a herbaceous non-native plant originating in Asia. Site-specific control methods need to match local situations. 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 is a member of the parsley or carrot family and was first introduced to North America as a garden ornamental. It's part of the carrot family, but it can grow up to 14 feet tall. Giant Hogweed. 2009. King County Department of Natural Resources (Washington). Ontario Ministry of Natural Resources (Canada). Denial of seed production, with appropriate site rehabilitation, for 4 to 5 years usually eradicates limited local populations. 0000013992 00000 n Center for Plant Health Science and Technology; California Department of Food and Agriculture. It develops a thick hollow stem that can grow up to 15-20’ (4.3-5.8m) tall with purple splotches and stiff bristles. Description: Giant Hogweed is a member of the parsley or carrot family (umbelliferae). Pennsylvania Department of Agriculture. Single giant hogweed plant can produce 20,000 to 100,000 seeds. W:Sonya/Letters/Giant hogweed fact sheet CONTROL Giant hogweed is very difficult to eradicate. Department of the Environment and Energy. GIANT HOGWEED Heracleum mantegazzianum Sommier & Levier Native Origin: Europe- introduced as an ornamental or spice Description: Giant hogweed is a biennial or perennial herb in the carrot family (Apiaceae), growing 15 to 20 feet in height with stout dark reddish-purple stems and spotted leaf stalks. YouTube; University of Maryland Extension. It is 2-4” (4.8-9.6 cm) in diameter. It is a member of the Apiaceae (Umbelliferae) family of plants, commonly known as the Carrot or Parsley family. Center for Invasive Species and Ecosystem Health. Provides state, county, point and GIS data. PA Noxious Weed Alert: Giant Hogweed (PDF | 1.31 MB), Noxious, Invasive and Poisonous Plant Program Publications, Giant Hogweed: Identification and Control (Sep 2020), Weed Control in Natural Areas in the Western United States: Giant Hogweed (2013) (PDF | 218 KB), New York Sea Grant Fact Sheet - Giant Hogweed (. Invasive Species Fact Sheet - Giant Hogweed (Heracleum mantegazzianum) Where does Giant Hogweed come from? Noxious weed seed and plant quarantine U.S. Weed Information; Heracleum mantegazzianum . Do not purchase and grow Giant hogweed plants or seeds. Massachusetts Introduced Pests Outreach Project. 0000176030 00000 n 0000012957 00000 n 0000240283 00000 n Federal Noxious Weed Disseminules of the U.S. - Fact Sheet: Invasive Plant Atlas of the United States - Giant Hogweed, New York Invasive Species Information - Giant Hogweed, Non-native Species Information: Giant Hogweed, Conservation Practice Job Sheet VT-315 - Giant Hogweed (PDF | 125 KB), New Hampshire's Prohibited Invasive Plant Fact Sheets. It is not known to be present in Minnesota and is a prohibited noxious weed on the eradicate list . It can live for several years but once it flowers and bears fruit it dies. This plant only reaches a maximum height of 2 metres (6ft 7) and the symmetrical flower heads only reach 20cm across. 0000175558 00000 n 0000004083 00000 n Giant hogweed can grow up to 15 feet tall and produce large clusters of white flowers. Giant Hogweed (Heracleum mantegazzianum) is a perennial plant and a member of the carrot family. Seeds generally fall at the base of the parent plant but survive transport by water and this is the main means of seed dispersal. The clear, watery sap of giant hogweed contains toxins that cause phytophotodermatitis. %PDF-1.6 %���� Giant hogweed (Heracleum mantegazzianum) is a VERY LARGE, invasive plant that can cause painful burns and permanent scarring. USDA. Seeds are dispersed by wind or by water. Connecticut Invasive Plant Working Group. Click on images to view full-size 0000005416 00000 n Title: Microsoft Word - Giant hogweed.doc Author: hbutalla Created Date: 2/14/2006 9:59:59 AM Water and Land Resources Division. It is generally the species that is thought of when referring to invasive hogweeds. 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. Its stems aren’t blotchy like those of giant hogweed (their colour graduates smoothly from green to purple) and are ridged, hollow and hairy. Alaska Center for Conservation Science. trailer [Accessed Mar 19, 2015]. 0000001506 00000 n 0000183080 00000 n With recent efforts to combat invasive plants in woodlands, Penn State Extension has released new resources to help with identification and control. 0000161838 00000 n phytophotodermatitis). See also: New Hampshire's Prohibited Invasive Plant Fact Sheets for additional invasive trees, shrubs, vines, and herbaceous plants . 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