i think thats lambs quarters

WELL...last night someone on name that plant forum indicated that it was called Yellowrocket, which led to finding that it is probably a very close relative of Yellowrocket: Wild Radish. Whis is a very close relative to Wild Mustard :-) The only reason it can't be Yellowrocket is because the stems and leaves have tiny hairs, which indicates it is Wild Radish. However. I have seen pics of Wild Radish now on Google Images that don't look like this plant, and some that show Yellowrocket looking dead-on accurate, save for the leaves. Ha. At any rate, I'm pulling them up...tis' not to be... Thanks so much for your help, timbu and fammsimm. Now I am also familiar with two other kinds of weeds, so if I spot them, I'll know right away :-) Joanna

It has the foliage of a bleeding heart but it's not obviously. It also looked like my trollius. Again NOT!. It looked like yet one other plant of mine. Again NOT. I've seen it around and it does fool me every now and then trying to blend in my garden, but this is a weed. A very healthy weed I have to say.

I think it's Acanthus mollis, a good ornamental plant.