Prunus mume (white flower form) Rosaceae Wayne Roderick, Orinda Prunus mume (white flower form) Rosaceae Wayne Roderick, Orinda Japanese flowering plums can become very long-lived small trees and are often used for bonsai. This white flowering form was very fragrant. One of the first ornamental trees to bloom, this is a classic picturesque tree of Japanese gardens. It is neither a true plum or a true apricot, but something in between. The small flowers cluster tightly to the stems. . Photo by Bruce Peters