The flower is called the 'flower of the sun' because they open up in the sun. They represent passion and creativity. They also symbolize cruelty, grief, and jealousy. It can mean to show strong passion, being associated with the legendary brave and courageous lion.
It's most commonly used on the Day of the Dead, Dia de Muertos, a Spanish and Mexican tradition. It is believed to lure souls back from the dead to the land of the living with its vibrant colors and powerful scents. The flower is placed on graves during the holiday.
I hope this helps! Good luck!