deutzia: any of various shrubs of the genus Deutzia having usually toothed opposite leaves and shredding bark and white or pink flowers in loose terminal clusters
hydrangea: any of various deciduous or evergreen shrubs of the genus Hydrangea
photo finish: in general, any very close finish; in particular, a finish of a race in which the contestants are so close together that the winner must be determined from a photograph taken at the instant of finishing