The Secret Colors Flowers Create: But How? And Why?

Only a few flowers, like cornflowers and Himalayan blue poppies, have achieved true blue, and all by using special chemical tricks like adding metals to their pigments, or making their petals more alkaline. “All of this is chemically quite difficult and not many species have evolved the enzymes to do it,” says Beverley Glover from the University of Cambridge. “Even with genetic modification, people have managed to make purple, bluish roses, but true blue isn’t happening.” So imagine her surprise when she found that many flowers have secret blue halos in their flowers. (Click on title for full story.)