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Status of Invasive Plants in Utah

Total number of exotic species reported: 440

Total number of records in EDDMapS: 146732


Invasive Plants by Category

  • Aquatic - 8 species, 2311 records
  • Forbs/Herbs - 250 species, 115533 records
  • Grass or Grasslike - 86 species, 7516 records
  • Hardwood Trees - 34 species, 9425 records
  • Shrub or Subshrub - 33 species, 5635 records
  • Vines - 18 species, 2758 records

Top Ten Abundant Invasive Plants (by number of reports)

  1. squarrose knapweed - 31712 reports
  2. musk thistle - 12836 reports
  3. saltcedar - 9004 reports
  4. hoary cress - 8254 reports
  5. Scotch thistle - 7057 reports
  6. houndstongue - 6060 reports
  7. Canada thistle - 5888 reports
  8. Russian knapweed - 4598 reports
  9. perennial pepperweed - 4002 reports
  10. tamarisk - 3414 reports

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

  1. Russian olive - 29/29 (100%)
  2. musk thistle - 29/29 (100%)
  3. Canada thistle - 29/29 (100%)
  4. common mullein - 29/29 (100%)
  5. bull thistle - 29/29 (100%)
  6. common yarrow - 29/29 (100%)
  7. field bindweed - 29/29 (100%)
  8. Russian knapweed - 29/29 (100%)
  9. creeping bentgrass - 29/29 (100%)
  10. prostrate pigweed - 29/29 (100%)

Counties with the most invasive species reported

  1. Kane County - 711 species
  2. Garfield County - 545 species
  3. Utah County - 368 species
  4. Salt Lake County - 363 species
  5. Washington County - 320 species
  6. Cache County - 290 species
  7. Weber County - 241 species
  8. Uintah County - 215 species
  9. San Juan County - 208 species
  10. Box Elder County - 206 species

Counties with the least invasive species reported

  1. Morgan County - 117 species
  2. Piute County - 130 species
  3. Iron County - 131 species
  4. Carbon County - 144 species
  5. Beaver County - 145 species
  6. Daggett County - 151 species
  7. Wayne County - 151 species
  8. Emery County - 157 species
  9. Rich County - 160 species
  10. Sevier County - 167 species

Report created on November 26, 2014 at 01:32 PM by the UGA Center for Invasive Species and Ecosystem Health using EDDMapS Technology and Data.