The deutzias are fairly new to gardens: the exception, D. scabra, was noticed in Japanese gardens by Engelbert Kaempfer (1712) and Carl Peter Thunberg (1784) but not actually seen in Europe till the 1830s; two-thirds of the species noted in the R.H.S. Dictionary were gathered in from the wild during the 20th century.A point made by Alice M. Coats, Garden Shrubs and Their Histories (1964) 1992, s.v. "Deutzia".
