Can you ID this for me?
Just a shot in the dark here ~ Wild Lettuce? Some other common and botanical names to research: Prickly Lettuce, Canada Lettuce, Lactuca canadensis, Lactuca serriola, Lactuca graminifolia and Lactuca biennis.
It most certainly isn't a Jerusalem Artichoke, my guess is something unpleasently weedy in the Senecio genus.
This message was edited Tuesday, May 14th 5:19 PM