Color polymorphism of flowering corollas as an adaptation to the latitudinal and seasonal distribution of solar energy

This paper presents data on the variation of qualitative and quantitative characteristics (spectral composition, position of the maximum and short-wavelength boundary) of the solar spectrum in the ultraviolet and visible regions. The latitudinal and seasonal distribution of solar radiation maximum has been established. It is hypothesized that the corolla color of flowering plants is the result of adaptation to the solar spectrum maximum.