This plant is growing on my Wisconsin shoreline.... It has these gorgeous flowers. They are the color of fading coneflowers. The vine has taken up a large space and I am not sure what it is? It is blooming in full sun on a lakeshore. I have another small one that has started in shade on a hillside, under oak trees?

Is it a thug? poisonous? native?

here is a link..

http://community.webshots.com/album/578404735pEQboI

I apologize for the photo quality. They were taken with a cell phone..

Here is a link that might be useful: webshots