Photos 22-25 show a "baby rue anemone" being "born". It appears to be coming out from the stem of the "mother plant"!
Images:
I've been battling the spread of this in my garden. This year, I'm employing more agressive (and labor intensive) techniques.
Unfortunately, if any plant has ever set seed, even this level of intervention this is insufficient. The seeds are too small to filter with a soil sieve. There can be a seed bank that goes unobserved until seedlings emerge. I think this is how I accidentally spread it to multiple locations in my garden. That's why it's important to not use the soil anywhere else, for anything else.