This plant is coming up in the woods near a creek in Northern Virginia (Zone 7a).
It's only a few inches tall right now. It reminds me of wild lettuce, but I'm not sure that's it.
Does anyone recognize it?
Agree with porkpal surely a wild brassica, could also try to tear/cut leaves. lettuce usually exude bit white sap when freshly cutted, while mustard won't. Also try smell it, it should have different odor.
Looks like an escapee from the veggie patch.
I always allow my greens to set seed, the song birds love them, the butterflies and ladybugs enjoy the flowers during a period of time when there's little else...
And... I often get returns!