Years ago I had a house in Pittsburgh with fantastic gardens planted by the previous owner. One small tree was unusual and I can't remember its name. Unfortunately, I have no photos, but it was a small tree (more tree than shrub) that bore small, delicate, bells-shaped flowers in spring that were pink and white. I think the name started with an e, maybe en, but I can't find it by searching such sketchy details. Does anyone have a clue?