It looks like a milkweed of sorts.

Someone on the weed forum correctly identified it as "Dame's Rocket" or Hesperis matronalis. It has been reported invasive in other states, so I'll need to keep a close eye on it. In the meantime, its putting on a wonderful early Spring show in our meadow.

Honest-to-goodness beautiful when in bloom (in masses), down-right annoying if not ugly when gone to seed, fully revealing its mustard-like genetics, with long, rather unsightly seedpods. I guess that's a ll a matter of taste. Much of my daily routine involves identifying and setting in motion the control of invasive species, and while this one is somewhere on that list, I don't get too concerned about it. In most cases where I see it growing, it is merely competing with burdock, garlic mustard, and buckthorn saplings! Why get involved in that fight? This plant is beautiful when in bloom, in ditches and roadsides, etc.

+oM

Along with digitalis, red campion and lunaria, it is a real doer in my woodland edges and clearings - one of my better experiments in our poplar wood, for sure.