Status of Invasive Plants in Connecticut

Total number of exotic species reported: 561

Total number of records in EDDMapS: 12721


Invasive Plants by Category

  • Aquatic - 20 species, 1064 records
  • Conifer Trees - 3 species, 19 records
  • Forbs/Herbs - 308 species, 3751 records
  • Grass or Grasslike - 67 species, 1089 records
  • Hardwood Trees - 46 species, 590 records
  • Shrub or Subshrub - 70 species, 3394 records
  • Vines - 32 species, 1190 records

Top Ten Abundant Invasive Plants (by number of reports)

  1. Japanese barberry - 829 reports
  2. multiflora rose - 710 reports
  3. oriental bittersweet - 611 reports
  4. winged burning bush - 327 reports
  5. garlic mustard - 285 reports
  6. yellow groove bamboo - 266 reports
  7. autumn olive - 251 reports
  8. European common reed - 156 reports
  9. Morrow's honeysuckle - 154 reports
  10. Japanese stiltgrass - 154 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 - 552 species
  2. New Haven County - 481 species
  3. New London County - 466 species
  4. Hartford County - 424 species
  5. Litchfield County - 412 species
  6. Tolland County - 303 species
  7. Middlesex County - 296 species
  8. Windham County - 290 species

Counties with the least invasive species reported

  1. Windham County - 290 species
  2. Middlesex County - 296 species
  3. Tolland County - 303 species
  4. Litchfield County - 412 species
  5. Hartford County - 424 species
  6. New London County - 466 species
  7. New Haven County - 481 species
  8. Fairfield County - 552 species

Report created on April 18, 2014 at 11:42 AM 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