I have a volunteer in pots that were supposed to be salad, but have grown only weeds. Except for this. It is evidently Lamiaceae. it looks like a humongous catnip only bluer and straighter. The leaves are about 3-1/2 inches long and 2 wide. The plant's about mint height. It smells like a cross between lemon, mint and maybe something else. It looks like mint but not quite as rugous, and more lobed than toothed. The leaves are literally almost identical to the catnip and the mint. I thought maybe Monarda but it's not as narrow or as dark a green. Something like shiso but not as ruffly. Any possibilities for me to go look at pictures of? Lamiacea is a huge order.

I'm in Georgia, and I don't know where the seeds would have come from, as this is my own soil and compost mix from last year, and I know all the rest of the weeds in it. I don't think I've seen this one around here before.(the salad seed was just old:) It doesn't match anything on the packet I used.

Ideas?