how big is it?
It looks like a corydalis to me but I might be misjudging the size. Something like Corydalis solida
I wouldn't move them in my garden, the soil is too resistant, the roots would never move into it. You'd be watering forver. In a garden where I worked you could move anything any time.
you're not going doolally. That's either an alpina or a macropetala I think. Richard will know
yes, I agree, Those stems are over, the new shoots are for this year
I suspect more germinated rather than the originals regrew, yhey make thousands of them. I'm forever pulling them out of flower beds, along with ash and field maple, but there are none in the mown grass
It's not a paeony is it.
Is it just the one shoot or are there more of them?
It resembles Rosebay Willowherb but would expect more of them
Just mow them off, they don't survive in mown grass.
the woodlice won't have killed it but they may be eating the dead stuff.
Buds at the top are what you need for survival. Has it got any of those?
yes. I doubt if they're seed raised when you wouldn't know what you'd got til they flowered. No reputable grower would do that would they? They'd use cuttings and label them male and female.