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Status of Invasive Plants in Michigan

Total number of exotic species reported: 572

Total number of records in EDDMapS: 54467


Invasive Plants by Category

  • Aquatic - 15 species, 3743 records
  • Conifer Trees - 3 species, 101 records
  • Forbs/Herbs - 349 species, 24448 records
  • Grass or Grasslike - 75 species, 11745 records
  • Hardwood Trees - 40 species, 1230 records
  • Shrub or Subshrub - 56 species, 5756 records
  • Vines - 34 species, 2276 records

Top Ten Abundant Invasive Plants (by number of reports)

  1. common reed - 8291 reports
  2. garlic mustard - 2735 reports
  3. purple loosestrife - 1827 reports
  4. marsh thistle - 1513 reports
  5. spotted knapweed - 1060 reports
  6. sand ryegrass - 959 reports
  7. Japanese knotweed - 956 reports
  8. white campion - 945 reports
  9. autumn olive - 838 reports
  10. reed canarygrass - 754 reports

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

  1. bush honeysuckles (exotic) - 81/83 (98%)
  2. purple loosestrife - 80/83 (96%)
  3. common yarrow - 79/83 (95%)
  4. orange hawkweed - 79/83 (95%)
  5. reed canarygrass - 79/83 (95%)
  6. buckhorn plantain - 79/83 (95%)
  7. black medic - 78/83 (94%)
  8. red sorrel - 78/83 (94%)
  9. common ragweed - 77/83 (93%)
  10. annual ragweed - 77/83 (93%)

Counties with the most invasive species reported

  1. Washtenaw County - 405 species
  2. Kalamazoo County - 392 species
  3. Berrien County - 376 species
  4. Wayne County - 372 species
  5. Oakland County - 336 species
  6. Ingham County - 327 species
  7. Lenawee County - 320 species
  8. Kent County - 316 species
  9. St. Clair County - 312 species
  10. Emmet County - 302 species

Counties with the least invasive species reported

  1. Wexford County - 52 species
  2. Missaukee County - 63 species
  3. Lake County - 69 species
  4. Osceola County - 71 species
  5. Gladwin County - 75 species
  6. Branch County - 91 species
  7. Tuscola County - 99 species
  8. Roscommon County - 100 species
  9. Oscoda County - 101 species
  10. Sanilac County - 104 species

Report created on July 30, 2014 at 03:16 PM by the UGA Center for Invasive Species and Ecosystem Health using EDDMapS Technology and Data.