Colorful flowers, red, yellow, purple, white, pink and other colors make nature particularly beautiful, but there are no black flowers. This is because black can absorb all the sunlight and heat up quickly under the sunlight. For example, we humans rarely wear black clothes in summer. Plants will not form black flowers in order to protect their delicate petals from being burned by the sun. Moreover, the petals of plants mainly contain carotenoids and anthocyanins, which can make the petals show red, orange, yellow, purple and other colors, but can not show black. Without melanin, of course, there would be no black flowers.
Some people may argue that although black flowers are extremely rare, they do exist, such as rare varieties of black rose, black peony, black tulip and so on. In fact, these rare varieties have been cultivated by human beings for a long time, which makes the color of flowers become very dark purple black, but so far, they have not really been cultivated into plant varieties that can produce completely black flowers.