The evergreen shrub Pieris floribunda is native to the Southeastern United States and is related to rhododendron and mountain laurel.
There are old-fashioned spiraeas with lacy white flowers such as ‘Bridal Wreath’ that are quite large, as well as many new dwarf cultivars on the market.
If you have shady areas in your garden you may like to try growing a shrub that is known as Japanese Kerria, a deciduous shrub for all seasons.