Love the plant; can't remember the name

When I bought this plant at The Plantsmen in Ithaca, in April, it was just a black nursery pot with a few small weeds emerging. Once established in a shady spot, however, it did exactly what it's supposed to do: it grew big serrated leaves and tall stems with small but interesting yellow flowers.

But by then it was July and for the life of me I could not remember what this thing was called. Ken Parker, the native plant specialist at Lockwoods here in Buffalo, came to my rescue. "Stoneroot," he said, looking at my iPhone picture. And so it is. (Colinsonia canadensis, to be exact.)

This might not be for everyone, but it is one of a collection of woodland natives I've been gradually installing. It's medicinal too--supposed to be good for the kidneys. I'm sure mine could use the help, but for now I'm enjoying it for its clearly woodland aesthetics.