Status of Invasive Plants in Maine

Total number of exotic species reported: 466

Total number of records in EDDMapS: 10239


Invasive Plants by Category

  • Aquatic - 14 species, 428 records
  • Conifer Trees - 3 species, 24 records
  • Forbs/Herbs - 283 species, 4570 records
  • Grass or Grasslike - 53 species, 724 records
  • Hardwood Trees - 30 species, 417 records
  • Shrub or Subshrub - 44 species, 1643 records
  • Vines - 25 species, 552 records

Top Ten Abundant Invasive Plants (by number of reports)

  1. Japanese knotweed - 275 reports
  2. multiflora rose - 229 reports
  3. Japanese barberry - 204 reports
  4. oriental bittersweet - 191 reports
  5. Morrow's honeysuckle - 171 reports
  6. bush honeysuckles (exotic) - 170 reports
  7. purple loosestrife - 149 reports
  8. glossy buckthorn - 147 reports
  9. reed canarygrass - 107 reports
  10. bittersweet nightshade - 96 reports

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

  1. Norway maple - 16/16 (100%)
  2. bush honeysuckles (exotic) - 16/16 (100%)
  3. common chickweed - 16/16 (100%)
  4. common mullein - 16/16 (100%)
  5. bull thistle - 16/16 (100%)
  6. Japanese knotweed - 16/16 (100%)
  7. common yarrow - 16/16 (100%)
  8. yellow toadflax - 16/16 (100%)
  9. common St. Johnswort - 16/16 (100%)
  10. orange hawkweed - 16/16 (100%)

Counties with the most invasive species reported

  1. Cumberland County - 385 species
  2. York County - 378 species
  3. Knox County - 341 species
  4. Penobscot County - 334 species
  5. Hancock County - 317 species
  6. Oxford County - 308 species
  7. Waldo County - 292 species
  8. Kennebec County - 279 species
  9. Lincoln County - 256 species
  10. Aroostook County - 256 species

Counties with the least invasive species reported

  1. Piscataquis County - 181 species
  2. Washington County - 218 species
  3. Sagadahoc County - 225 species
  4. Franklin County - 243 species
  5. Somerset County - 246 species
  6. Androscoggin County - 251 species
  7. Aroostook County - 256 species
  8. Lincoln County - 256 species
  9. Kennebec County - 279 species
  10. Waldo County - 292 species

Report created on April 16, 2014 at 12:02 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