Status of Invasive Plants in Montana

Total number of exotic species reported: 399

Total number of records in EDDMapS: 13869


Invasive Plants by Category

  • Aquatic - 11 species, 280 records
  • Forbs/Herbs - 257 species, 7821 records
  • Grass or Grasslike - 59 species, 1770 records
  • Hardwood Trees - 20 species, 140 records
  • Shrub or Subshrub - 22 species, 365 records
  • Vines - 18 species, 480 records

Top Ten Abundant Invasive Plants (by number of reports)

  1. leafy spurge - 120 reports
  2. Canada thistle - 114 reports
  3. spotted knapweed - 113 reports
  4. Russian knapweed - 113 reports
  5. field bindweed - 112 reports
  6. prickly lettuce - 112 reports
  7. field pennycress - 112 reports
  8. western salsify - 112 reports
  9. big chickweed - 111 reports
  10. curly dock - 110 reports

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

  1. Canada thistle - 56/56 (100%)
  2. spotted knapweed - 56/56 (100%)
  3. leafy spurge - 56/56 (100%)
  4. field bindweed - 56/56 (100%)
  5. Russian knapweed - 56/56 (100%)
  6. prickly lettuce - 56/56 (100%)
  7. field pennycress - 56/56 (100%)
  8. western salsify - 56/56 (100%)
  9. bull thistle - 55/56 (98%)
  10. common yarrow - 55/56 (98%)

Counties with the most invasive species reported

  1. Gallatin County - 295 species
  2. Missoula County - 276 species
  3. Ravalli County - 251 species
  4. Flathead County - 249 species
  5. Lake County - 241 species
  6. Sanders County - 204 species
  7. Park County - 203 species
  8. Lewis and Clark County - 202 species
  9. Yellowstone County - 191 species
  10. Carbon County - 188 species

Counties with the least invasive species reported

  1. Golden Valley County - 62 species
  2. Treasure County - 63 species
  3. Wheatland County - 66 species
  4. Prairie County - 70 species
  5. Liberty County - 70 species
  6. Garfield County - 80 species
  7. Fallon County - 82 species
  8. Deer Lodge County - 84 species
  9. Richland County - 87 species
  10. Carter County - 87 species

Report created on April 24, 2014 at 04:39 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