- Contact information
For information on Lakes in Wisconsin, contact:
- Wisconsin DNR Lakes
Division of Water
Bureau of Water Quality
- Aquatic Invasive Species Contacts
Purple Loosestrife - Crystal Lake
- Date First Found
- Location First Found
Along the shoreline of the campground.
- Original Extent
A Few Plants
Purple loosestrife is native to Europe and Asia. After being introduced to North America, it managed to escape the specialized insects and diseases that keep it in check in its native lands. Free from these natural controls, purple loosestrife gained a competitive edge over our native wetland plants. This advantage, along with prolific seed production and a large, hardy growth, has allowed purple loosestrife to invade many of our wetlands to the near total exclusion of most other vegetation;; it literally shades everything else out.