LEONARDO OF PISA (LEONARDUS PISANUS Or Fibonacci), Italian mathematician of the 13th century.
received an impulse, largely, it is true, from the Arabs of Spain, but also from the East; Leonardo Fibonacci, the first Christian algebraist, had travelled in Syria and Egypt.
Fibonacci's series is a sequence of numbers such that any term is the sum of the two preceding terms; also known as Lame series.
The Fibonacci Series was discovered in 1200 A.D.
The number of the florets in the two spirals are 21 and 34, both Fibonacci numbers, which is a Golden Ratio.