Virginia Sweetspire (Itea virginica)

Where to plant: pond bank zone (above high-water mark)
Type: deciduous shrub
Height x spread: 3-4 x 4-6 ft
Blooms: late spring
Bloom: showy, fragrant, white
Sun: full sun to partial shade
Water: medium to wet
Maintenance: low
Tolerates: heavy shade, erosion, clay soil, wet soil
Wildlife: attracts butterflies, other insects; seeds eaten by songbirds

https://plants.ces.ncsu.edu/plants/all/itea-virginica/