Spiraea prunifolia

Spiraea prunifolia is an upright growing shrub with overhanging twigs and glossy green leaves with an orange to red color in autumn.

Blooms in spring with large umbels of double white flowers before the leaves appear on the branches.

Note that the double flowered plant was described botanically before the single flowered plant hence the double flower became the species and the single flower became a variety or form of the species. The single-flowered one is the Spiraea prunifolia var. Simpliciflora.