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Status of Invasive Plants in Hawaii

Total number of exotic species reported: 510

Total number of records in EDDMapS: 3286


Invasive Plants by Category

  • Aquatic - 6 species, 43 records
  • Cactus - 1 species, 8 records
  • Conifer Trees - 1 species, 1 records
  • Forbs/Herbs - 198 species, 1060 records
  • Grass or Grasslike - 104 species, 562 records
  • Hardwood Trees - 85 species, 489 records
  • Palms - 1 species, 4 records
  • Shrub or Subshrub - 62 species, 286 records
  • Vines - 52 species, 286 records

Top Ten Abundant Invasive Plants (by number of reports)

  1. coco yam, wild taro - 17 reports
  2. swamp morningglory - 14 reports
  3. common water hyacinth - 13 reports
  4. buffelgrass - 12 reports
  5. big chickweed - 12 reports
  6. parrotfeather - 10 reports
  7. Brazilian waterweed - 9 reports
  8. paragrass - 9 reports
  9. barnyardgrass - 9 reports
  10. Brazilian peppertree - 8 reports

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

  1. English ivy - 4/5 (80%)
  2. melaleuca - 4/5 (80%)
  3. kudzu - 4/5 (80%)
  4. giant reed - 4/5 (80%)
  5. coral ardisia - 4/5 (80%)
  6. common water hyacinth - 4/5 (80%)
  7. Brazilian waterweed - 4/5 (80%)
  8. air-potato - 4/5 (80%)
  9. largeleaf lantana - 4/5 (80%)
  10. tall fescue - 4/5 (80%)

Counties with the most invasive species reported

  1. Maui County - 512 species
  2. Hawaii County - 497 species
  3. Honolulu County - 454 species
  4. Kauai County - 429 species

Counties with the least invasive species reported

  1. Kauai County - 429 species
  2. Honolulu County - 454 species
  3. Hawaii County - 497 species
  4. Maui County - 512 species

Report created on October 22, 2014 at 09:49 AM by the UGA Center for Invasive Species and Ecosystem Health using EDDMapS Technology and Data.