I just checked and I sowed Aquilegia Formosa, Castilleja Miniata, Potentilla Gracilis and Sisyrinchium Californicum. It doesn't look like any of those, but I'd take any non-invasive native. But it does really look like Chenopodium, in which case the county is going to make me pull it out. Argh. Thanks!

"the county is going to make me pull it out". I'm interested in that. How does that system work? Chenopodium album is a highly successful species and occurs pretty much all over the world. I've not heard of it causing ecological problems in the way that, say, Rhododendron ponticum has.

The county (King, WA state) does not require the removal of most common weeds - that is entirely left to the hands and preferences of the individual gardener. It only requires control of those listed on the Noxious Weed list (WA state's invasive species listing) and even many of those do not require eradication or removal, only observation and avoidance (if possible). Even the biggest problem noxious weeds in western Washington - Japanese knotweed, Himalayan blackberry and English ivy - are not in the "removal required" status for King County (although highly suggested!!). And neither the Chenopodium nor the Solanum on the other post are listed "noxious weeds".......they are just plain old weeds :-))

PSG, this link to the county's noxious weed listing may be helpful to you

This is growing behind my new bulkhead, which is subject to a native plant replanting (they call it remediation) and observation for three years by King County. All invasive and exotic (non-native) plants are required to be removed in these areas. So unfortunately I'm actually going to have to pull it out. I would likely just leave it on the rest of my property.

Pull it out and cook it up, it's better than spinach I think.

I'm tempted, but it's kinda tiny and needs to be pulled asap. But I bet there's more on my property if I look around.