• Guides
  • Invasive Plants to Watch for on Wassumkeag Island (Sears Island)

Invasive Plants to Watch for on Wassumkeag Island (Sears Island)

Some of these plants are already present on the island, and some are found nearby. All of these are destructive to native plants, animals and ecosystems. Please report any invasive plants from this list you see on the island! You can report invasives on our website at ...more ↓

Winged Euonymus 1
Euonymus alatus
Garlic Mustard 2
Alliaria petiolata
Cypress Spurge 3
Euphorbia cyparissias
Garden lupine 4
Lupinus polyphyllus
Purple Loosestrife
Lythrum salicaria
Morrow's Honeysuckle 5
Lonicera morrowii
Multiflora Rose 6
Rosa multiflora
Glossy Buckthorn 3
Frangula alnus
Common Buckthorn 7
Rhamnus cathartica
Autumn Olive 8
Elaeagnus umbellata
Himalayan Balsam 9
Impatiens glandulifera
Black Swallow-wort 10
Cynanchum louiseae
Japanese Knotweed 11
Fallopia japonica
Oriental Bittersweet 12
Celastrus orbiculatus
Creeping Thistle 13
Cirsium arvense
Bull Thistle 14
Cirsium vulgare
Coltsfoot 15
Tussilago farfara
Norway Maple 16
Acer platanoides
Purple Loosestrife
Lythrum salicaria
Japanese Barberry 17
Berberis thunbergii
Bittersweet Nightshade 18
Solanum dulcamara
Morrow's Honeysuckle 5
Lonicera morrowii
Tatarian honeysuckle 19
Lonicera tatarica
Common Valerian 20
Valeriana officinalis
Giant Hogweed 21
Heracleum mantegazzianum
Garlic Mustard 2
Alliaria petiolata
tufted hair grass 1
Deschampsia cespitosa
Woods Bluegrass
Poa nemoralis nemoralis
Reed Canarygrass
Phalaris arundinacea
Common Reed 22
Phragmites australis

Edited by Aleta M., some rights reserved (CC BY-SA)

Photo Credits

  • 1. (c) Matt Lavin, some rights reserved (CC BY-SA)
  • 2. (c) 57Andrew, some rights reserved (CC BY-NC-ND)
  • 3. (c) AnneTanne, some rights reserved (CC BY-NC)
  • 4. (c) Per Ola Wiberg, some rights reserved (CC BY)
  • 5. (c) Carolannie--temporarily AWOL, some rights reserved (CC BY-NC-ND)
  • 6. (c) wplynn, some rights reserved (CC BY-ND)
  • 7. (c) JanetandPhil, some rights reserved (CC BY-NC-ND)
  • 8. (c) Dave Spier, some rights reserved (CC BY-NC-SA)
  • 9. (c) Roy Wichert-Gonsalves, some rights reserved (CC BY-NC-ND)
  • 10. (c) Jomegat, some rights reserved (CC BY-SA)
  • 11. (c) Marie Studer, some rights reserved (CC BY), uploaded by Marie Studer
  • 12. (c) Elizabeth Sellers, some rights reserved (CC BY-NC-SA)
  • 13. (c) Matt Lavin, some rights reserved (CC BY)
  • 14. (c) beautifulcataya, some rights reserved (CC BY-NC-ND)
  • 15. (c) M.M. R, some rights reserved (CC BY-NC)
  • 16. (c) Marylise Doctrinal, some rights reserved (CC BY-NC-ND)
  • 17. (c) James Gaither, some rights reserved (CC BY-NC-ND)
  • 18. (c) Giuseppe Quattrone, some rights reserved (CC BY-NC-ND)
  • 19. (c) Charlie Hohn, some rights reserved (CC BY), uploaded by Charlie Hohn
  • 20. (c) Bart Busschots, some rights reserved (CC BY-NC-ND)
  • 21. (c) Cody Hough, some rights reserved (CC BY-NC-SA)
  • 22. (c) 2006 Luigi Rignanese, some rights reserved (CC BY-NC)

Member of the iNaturalist Network   |   Powered by iNaturalist open source software |   Documentation for developers