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Status of Invasive Plants in Wyoming

Total number of exotic species reported: 320

Total number of records in EDDMapS: 101787


Invasive Plants by Category

  • Aquatic - 7 species, 141 records
  • Forbs/Herbs - 197 species, 75803 records
  • Grass or Grasslike - 60 species, 1034 records
  • Hardwood Trees - 16 species, 158 records
  • Shrub or Subshrub - 17 species, 21069 records
  • Vines - 16 species, 199 records

Top Ten Abundant Invasive Plants (by number of reports)

  1. Dalmatian toadflax - 58311 reports
  2. tamarisk - 20905 reports
  3. Canada thistle - 11111 reports
  4. musk thistle - 2007 reports
  5. leafy spurge - 411 reports
  6. yellow toadflax - 250 reports
  7. spotted knapweed - 236 reports
  8. Dyer's woad - 184 reports
  9. perennial pepperweed - 111 reports
  10. dalmatian toadflax - 88 reports

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

  1. spotted knapweed - 23/23 (100%)
  2. musk thistle - 23/23 (100%)
  3. Canada thistle - 23/23 (100%)
  4. common mullein - 23/23 (100%)
  5. bull thistle - 23/23 (100%)
  6. leafy spurge - 23/23 (100%)
  7. field bindweed - 23/23 (100%)
  8. Russian knapweed - 23/23 (100%)
  9. creeping bentgrass - 23/23 (100%)
  10. smooth brome - 23/23 (100%)

Counties with the most invasive species reported

  1. Albany County - 235 species
  2. Park County - 233 species
  3. Teton County - 222 species
  4. Fremont County - 218 species
  5. Crook County - 207 species
  6. Sweetwater County - 200 species
  7. Sheridan County - 199 species
  8. Carbon County - 185 species
  9. Laramie County - 185 species
  10. Goshen County - 169 species

Counties with the least invasive species reported

  1. Uinta County - 108 species
  2. Niobrara County - 116 species
  3. Hot Springs County - 129 species
  4. Campbell County - 140 species
  5. Sublette County - 140 species
  6. Washakie County - 147 species
  7. Johnson County - 148 species
  8. Big Horn County - 151 species
  9. Weston County - 151 species
  10. Converse County - 158 species

Report created on September 2, 2014 at 02:48 AM by the UGA Center for Invasive Species and Ecosystem Health using EDDMapS Technology and Data.