Bright blooms that glow
Certain flowers fluoresce, giving off a spooky light.
![860_main_flowers.gif](https://www.snexplores.org/wp-content/uploads/2019/11/860_main_flowers.gif)
The parts of a four o'clock flower that appear yellow under white light (left) contain a special pigment. This pigment fluoresces, producing a greenish glow (right), as seen when other colors are filtered out.
Fernando Gandía-Herrero, Josefa Escribano and Francisco García-Carmona