Status of Invasive Plants in Michigan

Total number of exotic species reported: 546

Total number of records in EDDMapS: 26182


Invasive Plants by Category

  • Aquatic - 14 species, 1654 records
  • Conifer Trees - 3 species, 20 records
  • Forbs/Herbs - 329 species, 14266 records
  • Grass or Grasslike - 62 species, 2209 records
  • Hardwood Trees - 37 species, 899 records
  • Shrub or Subshrub - 52 species, 1383 records
  • Vines - 33 species, 1083 records

Top Ten Abundant Invasive Plants (by number of reports)

  1. purple loosestrife - 812 reports
  2. watercress - 260 reports
  3. bittersweet nightshade - 244 reports
  4. big chickweed - 225 reports
  5. redtop - 202 reports
  6. spotted knapweed - 197 reports
  7. orange hawkweed - 194 reports
  8. perennial sowthistle - 190 reports
  9. ladysthumb - 178 reports
  10. Canada thistle - 177 reports

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

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

Counties with the most invasive species reported

  1. Washtenaw County - 404 species
  2. Kalamazoo County - 393 species
  3. Berrien County - 372 species
  4. Wayne County - 366 species
  5. Oakland County - 329 species
  6. Ingham County - 324 species
  7. Lenawee County - 320 species
  8. Kent County - 306 species
  9. St. Clair County - 305 species
  10. Emmet County - 294 species

Counties with the least invasive species reported

  1. Wexford County - 47 species
  2. Missaukee County - 63 species
  3. Osceola County - 66 species
  4. Lake County - 69 species
  5. Gladwin County - 75 species
  6. Branch County - 91 species
  7. Roscommon County - 94 species
  8. Tuscola County - 98 species
  9. Otsego County - 98 species
  10. Luce County - 99 species

Report created on April 19, 2014 at 06:08 PM 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