cutleaf teasel: Dipsacus laciniatus (Dipsacales: Dipsacaceae): Invasive Plant Atlas of the United States

cutleaf teasel	USDA PLANTS Symbol: DILA4 U.S. Nativity: Exotic Habit: Forbs/Herbs
Dipsacus laciniatus L.

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Taxonomic Rank: Magnoliopsida: Dipsacales: Dipsacaceae
Synonym(s): cut-leaved teasel
Native Range: Europe, w. Asia (BAIL);
Appearance 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. Foliage Opposite leaves are joined at the base and form cups that surround the prickly stem. Flowers 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. Fruit 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.

Identification, Biology, Control and Management Resources

Vegetation Management Guide - Illinois Nature Preserves Commission

Selected Images from Invasive.org

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Flower(s); immature Chris Evans, University of Illinois, Bugwood.org Additional Resolutions & Image Usage	Infestation; Along a highway rest area. Chris Evans, University of Illinois, Bugwood.org Additional Resolutions & Image Usage	Foliage; Chris Evans, University of Illinois, Bugwood.org Additional Resolutions & Image Usage	Flower(s); Chris Evans, University of Illinois, Bugwood.org Additional Resolutions & Image Usage
Flower(s); Todd Pfeiffer, Klamath County Weed Control, Bugwood.org Additional Resolutions & Image Usage	Plant(s); Todd Pfeiffer, Klamath County Weed Control, Bugwood.org Additional Resolutions & Image Usage	Flower(s); Todd Pfeiffer, Klamath County Weed Control, Bugwood.org Additional Resolutions & Image Usage	Infestation; Todd Pfeiffer, Klamath County Weed Control, Bugwood.org Additional Resolutions & Image Usage

EDDMapS Distribution:
This map is incomplete and is based only on current site and county level reports made by experts and records obtained from USDA Plants Database. For more information, visit www.eddmaps.org