[JohnR]

Originally Posted by FishermanTim

If the leaves are shaped like the spade on a deck of cards, and grow on opposing sides of the stalk, and the stalks are green with a hint of red where the segments meet, it sounds like a plant I grew up calling "wild rhubarb".
It is an invasive plant, and will grow back from small pieces of root. I would also suggest checking with your local garden supply/nursery for suggestions for treatmnt. The other, more time consuming method is to dig them up, or keep cutting them back. Eventually this will kill them off, but as I said, it's time consuming.
Good luck.

This sounds like it alright. It's not the one in that other picture - stuff is nasty...