Herbaceous, monocarpic perennial. Grows as a basal rosette for at least one year. Forms a prickly, angled flowering stalk, 2-6' tall, typically in the second or third year.
Other names for this plant include:
- Common names: Fuller's teasel, wild teasel
- Scientific names: D. fullonum ssp. fullonum; D. fullonum ssp. slyvestris; D. sylvestris
Classification in Wisconsin: Restricted
- Ecological Threat
- Invades open areas, prairies, savannas, sedge meadows, roadsides, and disturbed areas.
- Rapid range expansion of cut-leaved teasel has been observed in several midwestern states.
Leaves: Opposite, large (up to 1.5' long), oblong, and prickly. Leaves of flowering plants join into a cup around the stem. Typical teasel leaves are not lobed.
Flowers: Hundreds of tiny flowers clustered in dense, egg-shaped heads. Stiff, spiny, leaf-like bracts curve up from the base of the flower head. Common teasel has purple flowers and bracts longer than the flower heads—common blooms from June-October.
Fruits & seeds: Each plant can produce as many as 2,000 seeds. Seeds remain viable in the soil for at least two years.
Roots: Deep taproot, up to 2' long and 1" in diameter.
Similar species: Cut-leaved teasel (Dipsacus laciniatus) leaves are broader and have deep, feathering lobes. Its bracts are shorter than the flower heads. The flowers are white and bloom from July-September.
- Mechanical: Rosettes can be dug up making sure to remove as much of the root as possible. Mature plants can be cut in complete bud stage; the plant will re-sprout but will not flower. Bag and dispose of stems—late spring burns.
Chemical: Foliar spray with triclopyr, clopyralid, aminopyralid, or metsulfuron before the plant has bolted. Spray rosettes in fall with glyphosate.
For more information on control techniques, visit the Teasels factsheet by the University of Wisconsin-Extension.
- Sources for content:
- Czarapata, Elizabeth; Invasive Plants of the Upper Midwest: an illustrated guide to their identification and control. The University of Wisconsin Press. 2005. Pg. 59-61
- University of Wisconsin-Extension Weed Science