Sweet Violet (Viola Odorata). Violaceae Flowers Provide Nectar For Butterflies In Early Spring. They Grow In Early Spring In Woodlands And Wet Areas. Violet Is The Color Of Light At The Short Wavelength End Of The Visible Spectrum, Between Blue And Invisible Ultraviolet. Sometimes The Colour Of The Violet Can Be Very Close To This Ultraviolet Side Of The Spectrum

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