eddmapslogo

Status of Invasive Plants in Connecticut

Total number of exotic species reported: 563

Total number of records in EDDMapS: 14598


Invasive Plants by Category

  • Aquatic - 20 species, 1108 records
  • Conifer Trees - 3 species, 19 records
  • Forbs/Herbs - 313 species, 4110 records
  • Grass or Grasslike - 77 species, 1243 records
  • Hardwood Trees - 47 species, 752 records
  • Shrub or Subshrub - 70 species, 4206 records
  • Vines - 32 species, 1633 records

Top Ten Abundant Invasive Plants (by number of reports)

  1. Japanese barberry - 978 reports
  2. multiflora rose - 972 reports
  3. oriental bittersweet - 927 reports
  4. winged burning bush - 440 reports
  5. garlic mustard - 382 reports
  6. autumn olive - 342 reports
  7. yellow groove bamboo - 287 reports
  8. Norway maple - 251 reports
  9. bush honeysuckles (exotic) - 219 reports
  10. Japanese knotweed - 187 reports

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

  1. Norway maple - 8/8 (100%)
  2. Canada thistle - 8/8 (100%)
  3. garlic mustard - 8/8 (100%)
  4. Japanese barberry - 8/8 (100%)
  5. oriental bittersweet - 8/8 (100%)
  6. spotted knapweed - 8/8 (100%)
  7. purple crown-vetch - 8/8 (100%)
  8. autumn olive - 8/8 (100%)
  9. winged burning bush - 8/8 (100%)
  10. ground ivy - 8/8 (100%)

Counties with the most invasive species reported

  1. Fairfield County - 549 species
  2. New Haven County - 481 species
  3. New London County - 467 species
  4. Hartford County - 424 species
  5. Litchfield County - 414 species
  6. Tolland County - 305 species
  7. Middlesex County - 296 species
  8. Windham County - 292 species

Counties with the least invasive species reported

  1. Windham County - 292 species
  2. Middlesex County - 296 species
  3. Tolland County - 305 species
  4. Litchfield County - 414 species
  5. Hartford County - 424 species
  6. New London County - 467 species
  7. New Haven County - 481 species
  8. Fairfield County - 549 species

Report created on August 28, 2014 at 09:15 AM by the UGA Center for Invasive Species and Ecosystem Health using EDDMapS Technology and Data.