Status of Invasive Plants in Illinois

Total number of exotic species reported: 602

Total number of records in EDDMapS: 55820


Invasive Plants by Category

  • Aquatic - 18 species, 2699 records
  • Conifer Trees - 3 species, 60 records
  • Forbs/Herbs - 345 species, 23215 records
  • Grass or Grasslike - 76 species, 6854 records
  • Hardwood Trees - 48 species, 1709 records
  • Shrub or Subshrub - 57 species, 8008 records
  • Vines - 35 species, 3079 records

Top Ten Abundant Invasive Plants (by number of reports)

  1. European buckthorn - 2214 reports
  2. multiflora rose - 1410 reports
  3. garlic mustard - 1018 reports
  4. reed canarygrass - 944 reports
  5. glossy buckthorn - 744 reports
  6. Queen Anne's lace, wild carrot - 719 reports
  7. smooth brome - 644 reports
  8. autumn olive - 634 reports
  9. bush honeysuckles (exotic) - 625 reports
  10. Japanese stiltgrass - 538 reports

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

  1. smooth brome - 103/102 (101%)
  2. wild parsnip - 103/102 (101%)
  3. common chickweed - 102/102 (100%)
  4. common mullein - 102/102 (100%)
  5. common yarrow - 102/102 (100%)
  6. orchardgrass - 102/102 (100%)
  7. wild garlic - 102/102 (100%)
  8. common ragweed - 102/102 (100%)
  9. cheatgrass - 102/102 (100%)
  10. shepherd's-purse - 102/102 (100%)

Counties with the most invasive species reported

  1. Cook County - 480 species
  2. DuPage County - 465 species
  3. Jackson County - 432 species
  4. Lake County - 391 species
  5. Kane County - 388 species
  6. Will County - 366 species
  7. Champaign County - 354 species
  8. McHenry County - 329 species
  9. St. Clair County - 310 species
  10. Union County - 310 species

Counties with the least invasive species reported

  1. Jasper County - 117 species
  2. Warren County - 117 species
  3. Clay County - 127 species
  4. Bond County - 130 species
  5. Mercer County - 135 species
  6. Marshall County - 140 species
  7. Edwards County - 141 species
  8. Brown County - 143 species
  9. Stark County - 148 species
  10. Putnam County - 150 species

Report created on April 23, 2014 at 10:24 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