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Status of Invasive Plants in Michigan

Total number of exotic species reported: 570

Total number of records in EDDMapS: 55081


Invasive Plants by Category

  • Aquatic - 15 species, 3743 records
  • Conifer Trees - 3 species, 101 records
  • Forbs/Herbs - 349 species, 24450 records
  • Grass or Grasslike - 74 species, 11743 records
  • Hardwood Trees - 40 species, 1230 records
  • Shrub or Subshrub - 55 species, 5755 records
  • Vines - 34 species, 2271 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 - 414 species
  2. Kalamazoo County - 400 species
  3. Berrien County - 382 species
  4. Wayne County - 379 species
  5. Oakland County - 345 species
  6. Ingham County - 334 species
  7. Lenawee County - 327 species
  8. Kent County - 323 species
  9. St. Clair County - 321 species
  10. Emmet County - 308 species

Counties with the least invasive species reported

  1. Wexford County - 62 species
  2. Missaukee County - 71 species
  3. Osceola County - 78 species
  4. Lake County - 79 species
  5. Gladwin County - 82 species
  6. Branch County - 97 species
  7. Tuscola County - 106 species
  8. Roscommon County - 107 species
  9. Oscoda County - 110 species
  10. Sanilac County - 111 species

Report created on September 21, 2014 at 04:08 PM by the UGA Center for Invasive Species and Ecosystem Health using EDDMapS Technology and Data.