Hydrangea arborescens
Seven barks was used by the North American Indians as a remedy for kidney and bladder stones and is still used for these purposes in modern herbalism.
From UCONN
Habitat: native to Southern New England across through the Midwest and down through the southern states
Habit and Form: a deciduous shrub; low growing, rounded habit; shrub is formed by numerous unbranched canes; 3' to 5' tall and generally wider than tall.
Summer Foliage: deciduous simple leaves; opposite leaf arrangement; elliptical leaf shape 2" to 8" long 2" to 5" wide; cordate leaf base; serrated leaf margins; dark green leaf color.
Autumn Foliage: leaves turn pale yellow and fall off and not ornamentally significant.
Flowers: large flowers composed of sterile and fertile flowers dull white to pinkish color blooms in June and continues throughout the summer. Clusters are 4" to 6" wide and showy