Status of Invasive Plants in Massachusetts

Total number of exotic species reported: 612

Total number of records in EDDMapS: 25729


Invasive Plants by Category

  • Aquatic - 20 species, 2528 records
  • Conifer Trees - 4 species, 47 records
  • Forbs/Herbs - 336 species, 9141 records
  • Grass or Grasslike - 73 species, 1302 records
  • Hardwood Trees - 53 species, 1134 records
  • Shrub or Subshrub - 71 species, 7116 records
  • Vines - 39 species, 2251 records

Top Ten Abundant Invasive Plants (by number of reports)

  1. multiflora rose - 1613 reports
  2. glossy buckthorn - 1392 reports
  3. oriental bittersweet - 1329 reports
  4. Japanese knotweed - 1079 reports
  5. Japanese barberry - 828 reports
  6. purple loosestrife - 806 reports
  7. perennial pepperweed - 761 reports
  8. reed canarygrass - 486 reports
  9. coltsfoot - 482 reports
  10. garlic mustard - 471 reports

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

  1. oriental bittersweet - 14/14 (100%)
  2. Canada thistle - 14/14 (100%)
  3. Norway maple - 14/14 (100%)
  4. Japanese barberry - 14/14 (100%)
  5. spotted knapweed - 14/14 (100%)
  6. purple crown-vetch - 14/14 (100%)
  7. ground ivy - 14/14 (100%)
  8. bush honeysuckles (exotic) - 14/14 (100%)
  9. purple loosestrife - 14/14 (100%)
  10. white poplar - 14/14 (100%)

Counties with the most invasive species reported

  1. Middlesex County - 541 species
  2. Essex County - 485 species
  3. Worcester County - 460 species
  4. Norfolk County - 456 species
  5. Hampshire County - 439 species
  6. Suffolk County - 430 species
  7. Berkshire County - 409 species
  8. Barnstable County - 398 species
  9. Hampden County - 394 species
  10. Plymouth County - 383 species

Counties with the least invasive species reported

  1. Dukes County - 285 species
  2. Nantucket County - 360 species
  3. Bristol County - 364 species
  4. Franklin County - 380 species
  5. Plymouth County - 383 species
  6. Hampden County - 394 species
  7. Barnstable County - 398 species
  8. Berkshire County - 409 species
  9. Suffolk County - 430 species
  10. Hampshire County - 439 species

Report created on April 18, 2014 at 02:13 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