I am very negligent about looking at identifying information once I get busy photographing in a garden.  I will have two cards with this blossom –  if anyone would be so kind as to tell me what it is, I will be appreciative!  I feel that it warrants a better name than White Blossom.  It reminds me of my own Desert Pearl card – (see mosaic under flowers or prairie) – but this would be the city flower, and the Desert Pearl the country flower.