Specific weed identification (New Jersey) (flowers, growing, roots, bush)

[chrisbrooklyn]

Hello,

My boyfriend's parents have a weed growing in their lawn. It pops up in the middle of other bushes and flowers they've already planted. The roots are very thick and round, and grow deep into the ground. They are difficult to pull out. I've included a photo. Can anyone help identify it?

http://www.flickr.com/photos/ccollis...in/photostream

Thank you,
Christine

[Pitt Chick]

photo?

[uggabugga]

Originally Posted by Pitt Chick

photo?

the image didn't take.

Weed | Flickr - Photo Sharing!