Oxalis

I wandered through my plant encyclopedia to see if I could identify which oxalis I have.  It is not wood sorrel or the invasive weed kind of oxalis.  It is a very reserved plant that has to die back and go to the basement in the winter.  The oxalis pot is full of small bulbs which have to be protected in Zone 6.   In late summer its red leaves and really pale flowers are striking.  Actually its leaves are pretty all summer.  Some one saw it peeking out from beneath a rhododendron bush and as is so often the case thought it was growing in the ground.  Actually this pot of oxalis is at least fifteen years old, having wintered in my mother's basement before it moved to my yard and basement.