Position your plant where it will get plenty of light but in summer move it out of strong sunlight as this will cause leaf ...

Violet by name, violet by nature, the genus Viola is a perfect example of purple in the natural world. Purple is common in plants, largely thanks to a group of chemicals called anthocyanins. When it ...

Angelina worked to earn her Gold Award in Girl Scouts by using black-margined loosestrife beetle to reduce Purple Loosestrife ...

WHEN the late Dr. R. J. Lythgoe, of University College, London, about 1935, took up research on visual purple--the photosensitive substance of the retinal rods-our knowledge in this field had ...

Purple nonsulfur bacteria are strongly photoheterotrophs, even if they are capable of photoautotrophy, and are equipped for living in dark environments. Purple sulfur bacteria can be found in ...

Gardeners discuss the oft-overlooked symbolism of nature that underlies the Pulitzer-prize winning novel Briana A. Thomas - Reporter Alice Walker’s fictional coming-of-age narrative The Color ...