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Status of Invasive Plants in Arizona

Total number of exotic species reported: 400

Total number of records in EDDMapS: 42401


Invasive Plants by Category

  • Aquatic - 13 species, 493 records
  • Cactus - 1 species, 3 records
  • Forbs/Herbs - 202 species, 17152 records
  • Grass or Grasslike - 106 species, 10373 records
  • Hardwood Trees - 33 species, 1189 records
  • Palms - 1 species, 1 records
  • Shrub or Subshrub - 23 species, 3636 records
  • Vines - 20 species, 1401 records

Top Ten Abundant Invasive Plants (by number of reports)

  1. salsola - 2140 reports
  2. cheatgrass - 2034 reports
  3. common mullein - 1533 reports
  4. Dalmatian toadflax - 1510 reports
  5. redstem filaree - 1469 reports
  6. African mustard - 1334 reports
  7. tamarisk - 1245 reports
  8. bull thistle - 1205 reports
  9. camelthorn - 1192 reports
  10. red brome - 1173 reports

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

  1. johnsongrass - 15/15 (100%)
  2. tamarisk - 15/15 (100%)
  3. puncturevine - 15/15 (100%)
  4. field bindweed - 15/15 (100%)
  5. wild oat - 15/15 (100%)
  6. rescuegrass - 15/15 (100%)
  7. bermudagrass - 15/15 (100%)
  8. barnyardgrass - 15/15 (100%)
  9. stinkgrass - 15/15 (100%)
  10. redstem filaree - 15/15 (100%)

Counties with the most invasive species reported

  1. Coconino County - 314 species
  2. Pima County - 286 species
  3. Maricopa County - 257 species
  4. Yavapai County - 241 species
  5. Apache County - 237 species
  6. Cochise County - 231 species
  7. Navajo County - 222 species
  8. Gila County - 206 species
  9. Mohave County - 182 species
  10. Santa Cruz County - 176 species

Counties with the least invasive species reported

  1. La Paz County - 66 species
  2. Yuma County - 97 species
  3. Greenlee County - 115 species
  4. Graham County - 163 species
  5. Pinal County - 169 species
  6. Santa Cruz County - 176 species
  7. Mohave County - 182 species
  8. Gila County - 206 species
  9. Navajo County - 222 species
  10. Cochise County - 231 species

Report created on August 29, 2015 at 10:42 AM by the UGA Center for Invasive Species and Ecosystem Health using EDDMapS Technology and Data.