Count the petals of a flower with petals. The sequence numbers are 1, 1, 2, 3, 5, 8, 12, 21.... The petals will be one of these numbers. You will not find a flower with 6 or 11 natural petals. Fibonacci probably never saw a poppy that has four petals. Don't tell him if you encounter him.
This sequence is named for the Italian mathematician Leonardo de Pisa (1170-c. 1250) who was known as Fibonacci. This is also called the Golden Ratio. Can you guess where Leonardo was from?
This ratio was in existence 1,200 years prior to Leonardo’s time. Indian mathematicians wrote of this in connection with the Sanskrit prose.