Some of the following plants are sold as ornamental plants. Some of them are native to one region, but are considered invasive in others. Some are just totally invasive imports. If you are planning a new garden, you might want to reconsider planting these species. If you already have them in your yard, consult a landscaping professional for help taming them. Here are 20 plants that have taken over the yards of your fellow Americans.

1. Bamboo

2. Chameleon Plant (Houttuynia cordata)

3. Gooseneck Loosestrife (Lysimachia clethroides)

4. Soapwort or "Bouncing Bet"

5. Japanese Honeysuckle (Lonicera japonica)

6. Snow on the Mountain

7. Balsam Plants

8. Moon Flowers

9. Creeping Jenny

10. Goldflame Spirea

11. St. John's Wort

12. Lemon Balm

13. Vinca, or Periwinkle Vine

14. Trumpet Vine

15. Scotch Broom

16. Wild Violet

17. Virginia Creeper

18. English Ivy

19. Milkweed

20. Elephant Ears

Chaya Kurtz writes for Networx.com.