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Status of Invasive Plants in New York

Total number of exotic species reported: 673

Total number of records in EDDMapS: 28288


Invasive Plants by Category

  • Aquatic - 23 species, 1523 records
  • Conifer Trees - 6 species, 104 records
  • Forbs/Herbs - 372 species, 12283 records
  • Grass or Grasslike - 100 species, 3714 records
  • Hardwood Trees - 59 species, 1427 records
  • Shrub or Subshrub - 71 species, 2184 records
  • Vines - 41 species, 1396 records

Top Ten Abundant Invasive Plants (by number of reports)

  1. Eurasian water-milfoil - 304 reports
  2. Japanese barberry - 282 reports
  3. multiflora rose - 260 reports
  4. Japanese stiltgrass - 257 reports
  5. garlic mustard - 228 reports
  6. curly-leaved pondweed - 189 reports
  7. tree-of-heaven - 176 reports
  8. redtop - 169 reports
  9. purple loosestrife - 159 reports
  10. barnyardgrass - 157 reports

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

  1. purple loosestrife - 62/62 (100%)
  2. bristlegrass - 60/62 (97%)
  3. bush honeysuckles (exotic) - 58/62 (94%)
  4. Canada bluegrass - 58/62 (94%)
  5. redtop - 58/62 (94%)
  6. reed canarygrass - 56/62 (90%)
  7. sweet vernalgrass - 56/62 (90%)
  8. timothy - 55/62 (89%)
  9. green foxtail - 55/62 (89%)
  10. American mannagrass - 55/62 (89%)

Counties with the most invasive species reported

  1. Suffolk County - 529 species
  2. Ulster County - 465 species
  3. Albany County - 454 species
  4. Orange County - 439 species
  5. Bronx County - 434 species
  6. Nassau County - 387 species
  7. Rockland County - 374 species
  8. Erie County - 371 species
  9. Tompkins County - 366 species
  10. Onondaga County - 361 species

Counties with the least invasive species reported

  1. Fulton County - 74 species
  2. Broome County - 87 species
  3. Cortland County - 95 species
  4. Orleans County - 109 species
  5. Wyoming County - 111 species
  6. Chenango County - 123 species
  7. Franklin County - 129 species
  8. Steuben County - 129 species
  9. Tioga County - 130 species
  10. Allegany County - 133 species

Report created on October 31, 2014 at 10:21 PM by the UGA Center for Invasive Species and Ecosystem Health using EDDMapS Technology and Data.