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Violet is the color of light at the short wavelength end of the visible spectrum. It is one of the seven colors that Isaac Newton labeled when dividing the spectrum of visible light in 1672. Violet light has a wavelength between approximately 380 and 435 nanometers. [2] The color's name is derived from the Viola genus of flowers.
Dalea purpurea is a perennial herb growing 20 to 90 cm (8 to 35 in) tall. The mature plant has a large taproot 5.5 to 6.5 feet (1.7 to 2.0 m) deep. The stem is woody with several branches. The leaves are a few centimeters long and are divided into 3 to 7 narrow leaflets. The inflorescence atop each stem branch is a spike up to 7 cm ( in) long ...