Can anyone ID this one? Is it a lychnis ... or maybe a silene? I don't think I planted it ... it just showed up.
Looks like a Phlox bifida to me but it may be a silene, any ballon shapes behind the flowers?
It's not the bladder campion. The flowers look very similar but they don't have the balloon behind them. It looks very much like the other picture I posted of silene dioica except it's white. The leaves are fuzzy and the flowers droop in the heat of the day reviving in the evening when temps cool off. This picture is from last year. If I can't ID it I'll take some more detailed pictures as it grows.