There are many symbolic meanings associated with the wisteria, particularly in Cine and Japan, but this is what expresses my pictorial interpretation: "The Flower of wisteria becomes the symbol of brightness and the transience of existence: everything changes constantly, at all times, with the passage of time, including exactly the same life, so you should appreciate every moment in eternity." http://www.giardinaggio.net/fiori/significato-dei-fiori/glicine.asp