0000008341 00000 n Federal government websites always use a .gov or .mil domain. This site is also protected by an SSL (Secure Sockets Layer) certificate that’s been signed by the U.S. government. 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. 0000004083 00000 n 0000006264 00000 n It is known to grow in freshwater wetlands, grasslands, dis-turbed areas, urban areas, and gardens. 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 -. European and Mediterranean Plant Protection Organization. %PDF-1.6 %���� 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 0000005660 00000 n 401 0 obj <>stream Includes species listed as a Federal Noxious Weed under the Plant Protection Act, which makes it illegal in the U.S. to import or transport between States without a permit. Home and Garden Information Center. Plant Industry. It is generally the species that is thought of when referring to invasive hogweeds. Grand River Conservation Authority – July 2010 GIANT HOGWEED (Heracleum mantegazzianum) FACT SHEET Habitat: Giant Hogweed is a herbaceous non-native plant originating in Asia. 0000007239 00000 n Giant hogweed (Heracleum mantegazzianum), also known as Giant cow parsnip is a perennial plant and a member of the carrot family. USA. 0000011460 00000 n The .gov means it’s official. Giant Hogweed was introduced to the UK in the early 19th Century. APHIS. [Accessed Mar 19, 2015]. 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 (. It prefers moist, disturbed soil and This plant only reaches a maximum height of 2 metres (6ft 7) and the symmetrical flower heads only reach 20cm across. Grows in moist soil, especially in ditches and ravines in both sun and shade. This is very similar-looking to giant hogweed but is much smaller. Its presence along river The https:// means all transmitted data is encrypted — in other words, any information or browsing history that you provide is transmitted securely. Its stems aren’t blotchy like those of giant hogweed (their colour graduates smoothly from green to purple) and are ridged, hollow and hairy. Water and Land Resources Division. Giant Hogweed (Heracleum mantegazzianum) is a plant native to Asia. 0000005416 00000 n Department of the Environment and Energy. 0000002281 00000 n It is a garden ornamental from southwest Asia that is naturalizing in North America and becoming more common in southern and central Ontario. 0000161570 00000 n 0000013344 00000 n It is 2-4” (4.8-9.6 cm) in diameter. Pennsylvania Department of Conservation and Natural Resources. CONCERN plants by monopolizing Giant hogweed can have negative impacts on both the environ-ment and human health. Or, to display all related content view all resources for Giant Hogweed. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory. Division of Plant Industry. 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). Seeds are dispersed by wind or by water. University of Georgia. 0000001506 00000 n European Network on Invasive Alien Species. ARS. 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. Provides state, county, point and GIS data. 0 0000003275 00000 n Reproduction and spread: Giant hogweed plants reproduce via seed. 0000240283 00000 n 0000000016 00000 n Before sharing sensitive information online, make sure you’re on a .gov or .mil site by inspecting your browser’s address (or “location”) bar. Giant Hogweed has large, flat-topped to slightly dome-shaped flower and seed head and a bumpy or bristly stem. The leaves are extremely large growing to … Giant hogweed has a phototoxic sap that, when exposed to light, can cause severe burns on the skin. Pennsylvania Department of Agriculture. 0000241861 00000 n Giant Hogweed. Giant hogweed has the potential to spread readily and grows along roadsides, ditches and streams. Division of Plant Industry. The section below contains highly relevant resources for this species, organized by source. If a person gets the sap on their skin and their skin is exposed to sunlight it can cause chemical burns. Giant hogweed is actually the common name of four species of large hogweeds that are invasive outside of their native range. x�b```f``�f`c`PX� Ā B��,.��=*�����|IǺ�"���9}�S�5�'`�� Heracleum mantegazzianumis the most common invasive large hogweed (growing up to 5.5 m) found in both Europe and North America. 0000121240 00000 n Habitat Morphology Integrated Taxonomic Information System. A total of 14 new invasive plant fact sheets are now available. 0000007125 00000 n 0000161838 00000 n It is not known to be present in Minnesota and is a prohibited noxious weed on the eradicate list . Here is a fact sheet provided by the Nova Scotia Department of Natural Resources on giant hogweed and its associated risks. 0000240771 00000 n National Genetic Resources Program. Giant hogweed is a short lived herbaceous biennial that dies after flowering (monocarpic). Heracleum mantegazzianum Sommier & Levier (ITIS), Produces toxic sap that can cause skin irritation and blindness (Gucker 2009). Plant Pest Risk Assessment for Giant Hogweed, Invasive Plants in Pennsylvania: Giant Hogweed (PDF | 180 KB), King County (Washington) Noxious Weed Control Program - Giant Hogweed. Effects may include welts, rashes, and blistering, followed by pigmented scarring that may persist for as long as six years. <<9B8A271E3ED23E4EBDE8723E035022EE>]>> %%EOF 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. GIANT HOGWEED The preferred method of control is integrated pest management (IPM). The leaves and flowers are very similar to that of cow parsley and the identification of Giant Hogweed is often confused for it. Impacts: Giant hogweed outcompetes native plant species for habitat. It blooms in midsummer. startxref Invasive Species Fact Sheet - Giant Hogweed (Heracleum mantegazzianum) Where does Giant Hogweed come from? Alberta Invasive Species Council (Canada). It is a garden ornamental from southwest Asia that is naturalizing in North America and becoming more common in southern and central Ontario. 0000009146 00000 n USDA. The .gov means it’s official.Federal government websites always use a .gov or .mil domain. 0000166692 00000 n Brushing against or breaking the plant releases sap that, combined with sunlight and moisture, can cause a severe burn within 24 to 48 hours. ����W`{z��s�,2R:����LLv,����ý�-��O 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. Connecticut Invasive Plant Working Group. 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. The stem and leaf stalks are … PPQ. 0000008571 00000 n phytophotodermatitis). Site-specific control methods need to match local situations. Giant hogweed (Heracleum mantegazzianum) is a member of the carrot or parsley family, Apiaceae (Umbelliferae). Washington State Noxious Weed Control Board. Giant hogweed resembles some of our native species such as Angelica, Queen Anne’s Lace, and Cow parsnip. Pesticide product registration is renewed annually. giant hogweed. 0000184503 00000 n EDRR Fact Sheet Randy G. Westbrooks, U.S. Geological Survey. Virginia Cooperative Extension. 0000241029 00000 n It can live for several years but once it flowers and bears fruit it dies. With no known diseases or insect pests here in Canada, the plant 0000176030 00000 n 0000012957 00000 n It was likely introduced to North America as an ornamental garden plant. 0000006488 00000 n Before sharing sensitive information online, make sure you’re on a .gov or .mil site by inspecting your browser’s address (or “location”) bar. Denial of seed production, with appropriate site rehabilitation, for 4 to 5 years usually eradicates limited local populations. If an established growth is found, it is recommended that a contractor be hired to remove the growth. trailer See also: New Hampshire's Prohibited Invasive Plant Fact Sheets for additional invasive trees, shrubs, vines, and herbaceous plants . USDA. Heracleum mantegazzianum. Alaska Center for Conservation Science. 0000007013 00000 n It can grow to a height of 15 to 20 feet. 0000183080 00000 n Product names and formula-tions may vary from year to year. Toxic sap is found in the leaves, stems, flowers, and roots of giant hogweed. 0000162259 00000 n Google. It invades old fields and native habitats such as open woodlands. Giant hogweed (Heracleum mantegazzianum) is a VERY LARGE, invasive plant that can cause painful burns and permanent scarring. 0000009806 00000 n Maps can be downloaded and shared. University of California. Announcing New Invasive Plant Fact Sheets Series. Giant Hogweed — Heracleum mantegassianum An invasive perennial and a public health hazard: Contact with sap followed by sun exposure can cause painful blistering. University of Alaska - Anchorage. Australian Government. Giant hogweed requires disturbance to estab-lish so it is important to maintain/restore desirable vegetation in habitats suitable for invasion. Invasive Species Alert Sheet Giant Hogweed. 0000241388 00000 n Giant hogweed's stem can range from 10-15 cm in diameter with course hairs. 0000005365 00000 n 0000112515 00000 n 0000010805 00000 n Weed Science. Gian hogweed can grow near roads and trails. 0000183810 00000 n 0000196319 00000 n It is a member of the Apiaceae (Umbelliferae) family of plants, commonly known as the Carrot or Parsley family. It develops a thick hollow stem that can grow up to 15-20’ (4.3-5.8m) tall with purple splotches and stiff bristles. 0000175558 00000 n Center for Invasive Species and Ecosystem Health. 0000015364 00000 n With recent efforts to combat invasive plants in woodlands, Penn State Extension has released new resources to help with identification and control. Giant Hogweed Heracleum mantegazzianum HABITAT Giant hogweed likes moist soil and pre-fers full sun. 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. Giant Hogweed Information Sheet (PDF) Giant hogweed can grow up to 15 feet tall and produce large clusters of white flowers. It's part of the carrot family, but it can grow up to 14 feet tall. The main difference is the height and the fact that it can cause serious burns to the skin. New Hampshire Department of Agriculture, Markets, and Food. Virginia Tech; Virginia State University. 0000010974 00000 n Whiteville, North Carolina. The clear, watery sap of giant hogweed contains toxins that cause phytophotodermatitis. Great Britain Non-Native Species Secretariat. 0000005127 00000 n 0000002444 00000 n Except ... rent as of the date of the fact sheet. 0000012268 00000 n 0000012678 00000 n Unlike native species, Hogweed can grow up to 5 metres tall and has an herbaceous stem 5 to 10 centimetres in diameter. Michigan Department of Agriculture and Rural Development. YouTube; University of Maryland Extension. 0000161908 00000 n 0000240033 00000 n Fact Sheets & Plant Guides: Introduced, Invasive, and Noxious Plants : Threatened & Endangered: Wetland Indicator Status ... giant hogweed, giant cow parsnip. 0000002099 00000 n New York Department of Environmental Conservation. 0000010200 00000 n 0000009553 00000 n Ontario's Invading Species Awareness Program (Canada). Purdue University Extension. Giant hogweed is an herbaceous dicotyledonous plant that is classified as having a biennial life cycle. As having a biennial life cycle Invading species Awareness Program ( Canada ) vines... 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