Status of Invasive Plants in Idaho

Total number of exotic species reported: 421

Total number of records in EDDMapS: 109460


Invasive Plants by Category

  • Aquatic - 11 species, 2539 records
  • Conifer Trees - 1 species, 2 records
  • Forbs/Herbs - 262 species, 90513 records
  • Grass or Grasslike - 65 species, 1956 records
  • Hardwood Trees - 26 species, 1111 records
  • Shrub or Subshrub - 21 species, 1438 records
  • Vines - 23 species, 2193 records

Top Ten Abundant Invasive Plants (by number of reports)

  1. leafy spurge - 17833 reports
  2. Canada thistle - 11046 reports
  3. spotted knapweed - 9435 reports
  4. rush skeletonweed - 7673 reports
  5. Scotch thistle - 5784 reports
  6. musk thistle - 4790 reports
  7. hoary cress - 4476 reports
  8. yellow toadflax - 3554 reports
  9. diffuse knapweed - 2997 reports
  10. Russian knapweed - 2797 reports

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

  1. Canada thistle - 44/44 (100%)
  2. spotted knapweed - 44/44 (100%)
  3. field bindweed - 44/44 (100%)
  4. Scotch thistle - 44/44 (100%)
  5. cheatgrass - 44/44 (100%)
  6. poison-hemlock - 43/44 (98%)
  7. Russian knapweed - 43/44 (98%)
  8. hoary cress - 43/44 (98%)
  9. musk thistle - 42/44 (95%)
  10. leafy spurge - 42/44 (95%)

Counties with the most invasive species reported

  1. Idaho County - 329 species
  2. Latah County - 312 species
  3. Ada County - 281 species
  4. Kootenai County - 267 species
  5. Nez Perce County - 263 species
  6. Bonner County - 254 species
  7. Canyon County - 221 species
  8. Bannock County - 205 species
  9. Washington County - 204 species
  10. Owyhee County - 199 species

Counties with the least invasive species reported

  1. Jerome County - 52 species
  2. Minidoka County - 65 species
  3. Camas County - 72 species
  4. Lincoln County - 81 species
  5. Jefferson County - 92 species
  6. Oneida County - 94 species
  7. Teton County - 98 species
  8. Payette County - 100 species
  9. Franklin County - 104 species
  10. Gooding County - 115 species

Report created on April 16, 2014 at 04:04 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