i need a bush r shrub identified

i had a bush r a shrub that grew around a tree and it was so beautiful. it bloomed once a year and it had pink and white blooms i need a picture and a name so i can replant it it had 2 b really old it was here when we bought the house it blooms like the middle of may it grows in northern louisiana 1 bloom a year

Not being from Louisiana it is a bit hard for me to tell what flower you mean only by its description. On the following site you will find photos of indigenous flowers of Louisiana and I suggest you have a look at it and if you find a photo that looks like the flower you mean point us at it so we may get a notion and direction where to look at:
http://www.pbase.com/ronnie_14187/ d100__d200_indigenous_flowers_of_louisiana_by_ronnie_ga ubert

Thanks