- Dipsacus laciniatus is a monocarpic perennial plant that grows as a basal rosette for at least a year until sending up a flowering stalk that can reach 6-7 ft. (1.8-2.1 m) in height. The plant dies after flowering.
- Opposite leaves are joined at the base and form cups that surround the prickly stem.
- The small, white flowers densely cover oval flower heads and are present from July to September. Spiny bracts are located on the ends of flower stems.
- A single plant can produce up to 2,000 seeds and can remain viable in the soil for at least two years.
- Ecological Threat
- Dipsacus laciniatus grows in open, sunny habitats preferring roadsides and other disturbed areas, although it can sometimes be found in high quality areas such as prairies, savannas, seeps, and sedge meadows. It was introduced from Europe in the 1700's and spreads by producing abundant seeds. It can be found in the northern states from Massachusetts to Colorado. This is an EDRR plant for the Southeastern United States. It has been reported in Virginia, West Virginia and Kentucky.
- Vegetation Management Guide - Illinois Nature Preserves Commission
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EDDMapS Distribution - This map is incomplete and is based only on current site and county level reports made by experts, herbaria, and literature. For more information, visit www.eddmaps.org
State Invasive List - This map identifies those states that list this species on their invasive species list. For more information, visit Invasive.org
Invasive Listing Sources
- City of Ann Arbor Michigan Parks and Recreation
- Colorado Noxious Weeds
- Faith Campbell, 1998
- Great Lakes Early Detection Network
- Hoffman, R. & K. Kearns, Eds. 1997. Wisconsin manual of control recommendations for ecologically invasive plants. Wisconsin Dept. Natural Resources, Bureau of Endangered Resources. Madison, Wisconsin. 102pp.
- Illinois Invasive Plant List
- Jil M. Swearingen, Survey of invasive plants occurring on National Park Service lands, 2000-2007
- John Randall, The Nature Conservancy, Survey of TNC Preserves, 1995.
- Mid-Atlantic Exotic Pest Plant Council, 2005
- Missouri Department of Conservation,
- Missouri Noxious Weeds
- New Jersey Department of Agriculture, Division of Plant Industry, 2004
- Nonnative Invasive Species in Southern Forest and Grassland Ecosystems
- Oregon Noxious Weeds
- WeedUS - Database of Plants Invading Natural Areas in the United States
- Wisconsin's Invasive Species Identification, Classification and Control Rule
|Common Name Reference:|| USDA, NRCS. 2010. The PLANTS Database. National Plant Data Center, Baton Rouge, LA, USA.|
|Scientific Name Reference:||USDA, NRCS. 2010. The PLANTS Database. National Plant Data Center, Baton Rouge, LA, USA.|