Just wondering if it's an interesting native plant or something that will take over if I leave it alone. It's both.

I'm not familar with weeds in your region. But for assistance with ID, take a good-sized sample to a local large independent garden center or to your county's Extension Serivce office.

Marti, this pops up everywhere around here and I see it along the roads and highways now At one time I think Janie told us what it was, but she called a ditch something ( maybe not nice) I never let them go to seed because I can't dig them out but they still end up everywhere, even hanging baskets

Plantain, nutsedge, and goosegrass.