Around 2 feet tall. Planted itself in my yard. I think the white bits might micro blooms, but I can't see them well if they are, either in person or by enlarging a pic.
TIA for any suggestions!

Looks like acalypha rhomboidea:
Common Threeseed Mercury (Acalypha rhomboidea)

Quite a number of acalyphas in this area...
tend to be annuals in my experience... except for acalypha hispida which runs rampant through my shady areas.

Thank you for the suggestion! I feel very confident that's the right genus. I have no idea how to sort the species. BONAP indicates a few. That's good enough for me.
http://bonap.net/Napa/TaxonMap...

Surprised you didn't inform me on the value of this plant, if there is one. I think I've pulled seedlings of that before but this year, I got sick of pulling weeds that are only there when it's hot if the only reason I'm out there is to pull them.

purpleinopp said:
Surprised you didn't inform me on the value of this plant, if there is one.

Found some!
https://www.henriettes-herb.co...
https://plants.ces.ncsu.edu/pl...

You're right... I can think of worse things to have than Virginia Copperleaf.

Thank you very much! Great pics @ that 2nd link. It looks like there were actual tiny blooms but I didn't notice. The blooms are so similar to Pilea.

I'm thinking it might be this one:
https://plants.ces.ncsu.edu/pl...

ok... they're both called "Three-seeded Mercury"...
I thought they were the same plant...

They're so similar! If I'd taken good enough pics to upload, I would be more interested in nailing down the species.