Romanesco broccoli florets. Close-up of florets of Romanesco broccoli (Brassica sp.) showing their typical spiral shape. The spiral shapes of the florets describe a Fibonacci mathematical series,one in which each number is the sum of two previous numbers. For example: 0,1,1,2,3,5,8,13,21 and so on. This series was discovered by Italian mathematician Leonardo Fibonacci (1170-1240) and many natural patterns can be described using it. The florets are edible,and are a good source of vitamins A and C,and of the essential minerals iron and potassium |