In this article, we investigated the origin of the strong luminescence from disordered films of gold nanoflowers. To this end, we studied the excitation wavelength dependence of the emission spectrum for excitation wavelengths from λ ex = 425 nm -630 nm. The strong correlation of the photoluminescence excitation spectrum with the interband transitions of gold demonstrated that the emission is preceded by the excitation of electrons from the 5d -band.