The honey bees like this one.
Each branch has many small flowers that bloom consecutively.
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Looks like one of the naturalized strains of Perilla frutescens.
Perilla frutescens has been widely naturalized in parts of the United States and Canada, from Texas and Florida north to Connecticut and into Ontario, and west to Nebraska. It can be weedy or invasive in some of these regions.
It certainly is a weed here, and although it is edible, I find the flavor repulsive. It tolerates poor and dry soil, and I see it more in the open woods than in my veggie garden.
See Comparison pics: