White Meadowsweet, a native species, has been added to the USWildflowers database (09/04/2015.) Scientific name is Spiraea alba. Photo below was taken in a cove off of Baie Fine of Lake Huron in the Ontario, Canada on August 13, 2015. Go to the White Meadowsweet detail page for more photos and information.
White Meadowsweet – Spiraea alba