Twenty Most Invasive Plant Species

Last edited February 24, 2003

From Invasive Plant Council of New York State (IPCNYS)

Note: This list is is in order by common name, not by order of importance.

1. Black Locust - Robinia pseudoacacia

2. Black Swallow-worts - Cynanchum species: C. nigrum and C. rossicum

3. Buckthorn Species: Common buckthorn - Rhamnus cathartica, Smooth buckthorn - Rhamnus frangula

4. Common Reed - Phragmites australis

5. Curly Pondweed - Potamogeton crispus

6. Elaeagnus Species: Autumn olive - E. umbellata, Russian olive - E. angustifolia

7. Eurasian Water Milfoil - Myriophyllum spicatum

8. Garlic Mustard - Alliaria petiolata

9. Honeysuckles (non-native shrub species), including: Fly honeysuckle - Lonicera morrowii, Tartarian honeysuckle - Lonicera tatarica

10. Japanese Barberry - Berberis thunbergii

11. Japanese Honeysuckle - Lonicera japonica

12. Japanese Knotweed - Polygonum cuspidatum

13. Japanese Stilt Grass - Microstegium vimineum

14. Multiflora Rose - Rosa multiflora

15. Norway Maple - Acer platanoides

16. Oriental Bittersweet - Celastrus orbiculatus

17. Porcelain-berry - Ampelopsis brevipedunculata

18. Purple Loosestrife - Lythrum salicaria

19. Spotted or Bushy Knapweed - Centaurea maculosa

20. Water Chestnut - Trapa natan