Status of Invasive Plants in Wisconsin

Total number of exotic species reported: 482

Total number of records in EDDMapS: 29573


Invasive Plants by Category

  • Aquatic - 16 species, 2276 records
  • Conifer Trees - 2 species, 42 records
  • Forbs/Herbs - 303 species, 16204 records
  • Grass or Grasslike - 54 species, 3471 records
  • Hardwood Trees - 28 species, 613 records
  • Shrub or Subshrub - 42 species, 1408 records
  • Vines - 23 species, 942 records

Top Ten Abundant Invasive Plants (by number of reports)

  1. wild parsnip - 2370 reports
  2. teasel - 1412 reports
  3. common reed - 1005 reports
  4. Eurasian water-milfoil - 791 reports
  5. spotted knapweed - 565 reports
  6. curly-leaved pondweed - 558 reports
  7. Japanese knotweed - 401 reports
  8. purple loosestrife - 221 reports
  9. European buckthorn - 211 reports
  10. redtop - 204 reports

Top Ten Widespread Invasive Plants (by number of positive counties)

  1. purple loosestrife - 73/72 (101%)
  2. common yarrow - 72/72 (100%)
  3. yellow toadflax - 72/72 (100%)
  4. European cranberrybush - 72/72 (100%)
  5. white campion - 72/72 (100%)
  6. bush honeysuckles (exotic) - 71/72 (99%)
  7. bladder campion - 71/72 (99%)
  8. common mullein - 70/72 (97%)
  9. hoary alyssum - 70/72 (97%)
  10. red clover - 70/72 (97%)

Counties with the most invasive species reported

  1. Dane County - 378 species
  2. Milwaukee County - 320 species
  3. Walworth County - 316 species
  4. Sheboygan County - 302 species
  5. Brown County - 290 species
  6. Rock County - 290 species
  7. Racine County - 286 species
  8. Kenosha County - 277 species
  9. Waukesha County - 253 species
  10. Richland County - 245 species

Counties with the least invasive species reported

  1. Menominee County - 76 species
  2. Pepin County - 99 species
  3. Burnett County - 103 species
  4. Clark County - 108 species
  5. Barron County - 111 species
  6. Rusk County - 116 species
  7. Washburn County - 118 species
  8. Eau Claire County - 120 species
  9. Florence County - 124 species
  10. Iron County - 126 species

Report created on April 16, 2014 at 12:14 AM by the UGA Center for Invasive Species and Ecosystem Health using EDDMapS Technology and Data.



Bugwood Center Developed by The University of Georgia - Center for Invasive Species and Ecosystem Health.
Last updated on Tuesday, December 04, 2012 at 08:59 AM