Native to China, the Seven-Son Flower was first brought into Western cultivation in 1907 by the British plant hunter, Ernest Wilson, on behalf of Harvard's Arnold Arboretum. Although  threatened with habitat loss in its native locations, it is now found in gardens around the world. Its small, fragrant white flowers are attractive to bees and butterflies. Once they fall, the calyces (the outermost parts of the flowers) turn bright red and persist into late fall, effectively providing a second stunning show. This relative of Viburnum and Forsythia is, to understate the case, very special.