Identification: Plant Name Unknown

I need help in identifying a plant given to me by an elderly lady who said the plant was her great grandmothers. The plant is delicate with crimson clover-like leaves and small light pink flowers in clusters of seven to the stem. When removed from the light the leaves close downward. She called the plant a "clover plant" but I have been unable to find a reference to it.

Thanks...Bob

 

looks like a type of Oxalis

 

Appears to be Oxalis triangularis subsp. papilionacea (syn. O. regnellii), Purple Shamrock.

 

Thanks! I looked it up after your kind reply and that's it! The puzzle is solved thanks to you.