Can you help me identify this plant in my yard in Central Pennsylvania? It started out with handsome green and white leaves, opposite, and fairly lobed/serrated. Stems were reddish-purple. Here is a picture from April 12, fitting that description, when the plants were already fairly large:
I have tried to find it in the New Jersey Weed Gallery from Rutgers, Minnesota Extension's Is this plant a weed?, Wildflower Search. But then, I'm not sure if it's a weed, a native, or perhaps a vegetable (it's growing in an old vegetable garden).