eli5: How do flowers come in a wide variety of colors besides green, despite most plants’ chlorophyll reflecting green light?

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I might have it mixed up, but do flower pedals not have chlorophyll? Or does their chlorophyll absorb green light and reflect other lights? Where do flower pedals get their color from?

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8 Answers

Anonymous 0 Comments

There are green flowers, but flower petals are primarily there to get the attention of insects so they come to the flower to pollinate it. Any other color besides green stands out among the sea of green foliage.

And for the most part, no, flower petals do not photosynthesize. However in some cases they do. A few orchid flowers from the Phalaenopsis genus actually turn into proper leaves after their pollination period has finished.

the colors of flowers are primarily from other types of pigments. Anthocyanins are a group of pigments often responsible for red, purple, and pink in plants, while carotenoids tend to provide oranges and yellows and some reds as well. Blues are a bit trickier which is why you don’t see many truly blue flowers or leaves as their are very few true blue pigments in nature, most of the time the plant uses crystal or wax structures or other tricks of the light to create the deception of a blue color.

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