1. ALIEN INVASION! WEED WACKERS presentation for lesson “Alien Invasion in Alaska?!”

3. Photo by L.L. Berry, Bugwood.org
John Cardina, Ohio State University
Spotted knapweed (Centaurea stoebe ssp. micranthos) has completely invaded this field in Colorado.

4. Photo by USDA, ARS Invasive Plant Research Laboratory
Waterlettuce (Pistia stratiotes) completely clogs Lake Okeechobee in southern Florida.

5. UAF Cooperative Extension Archive, University of Alaska - Fairbanks
Orange hawkweed (Hieracium aurantiacum) can easily spread and take over natural habitats.

6. Yellow toadflax (Linaria vulgaris) has invaded this hillside in Utah.
Photo by Steve Dewey, Utah State University
Yellow toadflax (Linaria vulgaris) has invaded this hillside in Utah.
Photo by Michael Shephard, USDA Forest Service

7. Photo from http://neatorama. cachefly
Kudzu (Pueraria montana) completely covered this cabin in the southern United States. Kudzu is a vine that can grow quickly and climb.

8. Kudzu climbed all over this car!
Photo from
Kudzu climbed all over this car!

9. • What do you know about invasive plants
• What do you know about invasive plants? • What do you wonder about invasive plants? • How can we learn about invasive plants?