Status of Invasive Plants in Maryland

Total number of exotic species reported: 441

Total number of records in EDDMapS: 7114


Invasive Plants by Category

  • Aquatic - 16 species, 220 records
  • Conifer Trees - 3 species, 9 records
  • Forbs/Herbs - 203 species, 2246 records
  • Grass or Grasslike - 73 species, 1128 records
  • Hardwood Trees - 49 species, 597 records
  • Shrub or Subshrub - 65 species, 1057 records
  • Vines - 28 species, 968 records

Top Ten Abundant Invasive Plants (by number of reports)

  1. tree-of-heaven - 318 reports
  2. wavyleaf basketgrass - 297 reports
  3. multiflora rose - 293 reports
  4. Japanese honeysuckle - 275 reports
  5. mile-a-minute vine - 245 reports
  6. Japanese stiltgrass - 228 reports
  7. Japanese barberry - 211 reports
  8. garlic mustard - 210 reports
  9. wine raspberry - 130 reports
  10. Japanese hop - 126 reports

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

  1. Japanese stiltgrass - 22/24 (92%)
  2. mile-a-minute vine - 22/24 (92%)
  3. Canada bluegrass - 22/24 (92%)
  4. Asiatic dayflower - 21/24 (88%)
  5. buckhorn plantain - 21/24 (88%)
  6. Japanese honeysuckle - 20/24 (83%)
  7. multiflora rose - 20/24 (83%)
  8. bald brome - 20/24 (83%)
  9. red sorrel - 20/24 (83%)
  10. curly dock - 20/24 (83%)

Counties with the most invasive species reported

  1. Prince George's County - 357 species
  2. Montgomery County - 313 species
  3. Baltimore County - 259 species
  4. Calvert County - 217 species
  5. Frederick County - 207 species
  6. Howard County - 207 species
  7. Cecil County - 205 species
  8. Anne Arundel County - 197 species
  9. Worcester County - 180 species
  10. Washington County - 154 species

Counties with the least invasive species reported

  1. Somerset County - 43 species
  2. Baltimore city - 45 species
  3. Queen Anne's County - 60 species
  4. Dorchester County - 77 species
  5. St. Mary's County - 82 species
  6. Wicomico County - 83 species
  7. Charles County - 94 species
  8. Carroll County - 99 species
  9. Harford County - 105 species
  10. Kent County - 115 species

Report created on April 24, 2014 at 05:20 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