Delaware Invasive Plant Plant List Weed Identification

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PDF 37 pages 28 species with images: Plants on Delaware?s Invasive Plant List were chosen by a committee of experts in environmental science and botany, as well as representatives of State agencies and the Nursery and Landscape Industry. Delaware Invasive Plant Plant List Weed Identification. An environmental assessment was conducted on each of the plants listed, and placement on the list results from review of the scientific literature, as well as a consensus of expert opinion. Plants on the list are ordered from highest invasiveness. Plants on the list should not be planted, under any circumstances, and should be removed from properties as feasible. Listed plants that are currently in the nursery trade should be phased out of inventory and production. A more complete list can be viewed at: www.dnrec.state.de.us/fw/wildrehe.htm REVISED: March 07, 2006.

Widespread and Invasive - Growth Habit

1. Multiflora rose Rosa multiflora S

2. Oriental bittersweet Celastrus orbiculata V

3. Japanese stilt grass Microstegium vimineum H

4. Japanese knotweed Polygonum cuspidatum H

5. Russian olive Elaeagnus umbellata S

6. Norway maple Acer platanoides T

7. Common reed Phragmites australis H

8. Hydrilla Hydrilla verticillata A

9. Mile-a-minute Polygonum perfoliatum V

10. Clematis Clematis terniflora S

11. Privet Several species S

12. European sweetflag Acorus calamus H

13. Wineberry Rubus phoenicolasius S

14. Bamboo Several species H

Restricted and Invasive

15. Japanese barberry Berberis thunbergii S

16. Periwinkle Vinca minor V

17. Garlic mustard Alliaria petiolata H

18. Winged euonymus Euonymus alata S

19. Porcelainberry Ampelopsis brevipedunculata V

20. Bradford pear Pyrus calleryana T

21. Marsh dewflower Murdannia keisak H

22. Lesser celandine Ranunculus ficaria H

23. Purple loosestrife Lythrum salicaria H

24. Reed canarygrass Phalaris arundinacea H

25. Honeysuckle Lonicera species S

26. Tree of heaven Alianthus altissima T

27. Spotted knapweed Centaruea biebersteinii H

Restricted and Potentially-Invasive

28. Butterfly bush Buddleia davidii S

Growth Habit: S=shrub, V=vine, H=herbaceous, T=tree, A=aquatic

Regions Impacted: (See related documents in region)

USA,

Mid Atlantic,

Middle Atlantic,

Northeastern

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