large bell shaped flowers

by june white
(sauk rapids mn.)

what am I

tall 2-3 ft. alternating flowers five petals rounded on edges-doubles 2 rounds of petals-triples 3 rounds of petals -some white ,some lilac,some purple-- pointed narrow leaves with veining and saw tooth edges grow in sun/shade we are in Sauk Rapids,Mn. zone 3-4 this is the 1st year they have shown up-oh they are large pods before they opeen to flower-have asked many people and everyone is stumped -all they cansay is WOW are they pretty